UN Report Warns of Rising Global Temperatures

 

The latest UN report reveals alarming trends in global emissions. Despite advancements in renewable energy and electric vehicles, the world is on track for a temperature rise of 2.6°C above pre-industrial levels. If current policies remain unchanged, this could escalate to 3.1°C. UN Secretary-General Antonio Guterres warns that without bridging the emissions gap, we face a climate disaster, disproportionately affecting the poorest.

Current Emission Trends

Global emissions have surged from 37.8 billion tonnes in 1990 to 57.1 billion tonnes in 2023. In 2023 alone, emissions rose by 1.3% compared to 2022. This increase far exceeds the pre-pandemic average of 0.8% annually from 2010 to 2019. Such trends highlight the urgent need for action to curb emissions.

National Climate Targets

Countries are preparing their national climate targets, known as nationally determined contributions (NDCs), for 2035. These targets are part of the Paris Agreement. Nations are expected to submit their NDCs in early 2025. The report stresses that limiting temperature rise to 1.5°C is still feasible, but requires effort.

Required Emission Reductions

To achieve the 1.5°C goal, global emissions must be reduced by 42% by 2030 and 57% by 2035. This represents a massive undertaking. The report emphasizes the need for immediate action, stating that we are at a critical juncture.

Mobilisation for Change

Inger Andersen, Executive Director of the UN Environment Programme, calls for unprecedented global mobilization. Immediate action is essential before the next round of climate pledges. The delay could jeopardize the 1.5°C goal, pushing it out of reach.

Strategies for Emission Reduction

The report outlines strategies to achieve necessary emissions reductions. Key actions include implementing the Dubai agreement, which aims to triple renewable energy and double energy efficiency by 2030. Increased deployment of solar and wind energy could contribute to emission reductions, providing 27% of the total potential in 2030 and 38% by 2035.

Forests and Land Use

Action on forests is also critical. Forest management could deliver about 20% of the emission reduction potential by both 2030 and 2035. Protecting and restoring forests can play a vital role in combating climate change.

Transition from Fossil Fuels



Transitioning away from fossil fuels is paramount. Currently, approximately 68% of emissions stem from fossil fuel combustion in the energy sector and industrial processes. Reducing reliance on coal, oil, and gas is essential for achieving climate targets.

The report calls for a six-fold increase in investment for mitigation efforts to achieve net-zero emissions. This requires reforming the global financial architecture, encouraging strong private sector involvement, and encouraging international cooperation.

Global leaders must act decisively to reduce emissions and combat climate change. The time for meaningful action is now, as the consequences of inaction will be severe and far-reaching.




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UN Recognizes Antimicrobial Resistance as Global Health Threat

 

The UN General Assembly addressed the urgent issue of antimicrobial resistance (AMR). They labeled it an important global health threat. The assembly called for immediate action, emphasizing the One Health approach. This approach considers the interconnectedness of human, animal, and environmental health.

About Antimicrobial Resistance (AMR)

Antimicrobial resistance refers to the ability of microbes to resist the effects of medications. This includes antibiotics, antivirals, antifungals, and antiparasitics. These drugs are used in humans, animals, and agriculture. Misuse and overuse of these drugs have been common since the 1950s. They are often used not just for treating infections but also as growth promoters in livestock.

Historical Background

The World Health Organization (WHO) recommended phasing out antibiotic growth promoters in agriculture back in 2000. Despite this recommendation, the practice continues in many regions. This misuse contributes to the rise of resistant strains of bacteria, viruses, fungi, and parasites.

Impact on Health

AMR threatens the progress made in treating infectious diseases. It complicates efforts to eliminate diseases like tuberculosis (TB) and malaria. The emergence of drug-resistant strains makes surgeries and cancer treatments riskier. This situation leads to increased healthcare costs and complications in medical procedures.

Socioeconomic Consequences

AMR disproportionately affects low- and middle-income countries. These nations often lack the resources to combat rising resistance. The World Bank predicts that AMR could lead to an additional healthcare cost of up to $1 trillion by 2050. Furthermore, economic losses could range from $1 to $3.4 trillion annually by 2030. This financial burden could rival the costs seen during the 2008 global financial crisis.

The One Health Approach

The One Health approach integrates human, animal, and environmental health. It recognizes that diseases can spread across these domains. Effective solutions to AMR require collaboration across sectors. This includes healthcare, agriculture, and environmental management.

Global Response and Initiatives

The UN’s recognition of AMR has spurred global discussions. Countries are encouraged to adopt strategies that reduce antibiotic misuse. Initiatives focus on improving surveillance, promoting responsible use of antimicrobials, and enhancing infection prevention measures.

The Role of Education and Awareness

Raising awareness about AMR is crucial. Public education can lead to better practices in medication use. Healthcare professionals must advocate for responsible prescribing. Farmers should be educated on the risks of using antimicrobials for growth promotion.

Addressing AMR requires a multi-faceted approach. Governments must enforce regulations on antibiotic use. Investments in research for new antimicrobials and alternatives are essential. Global partnerships can strengthen efforts to combat this pressing health threat.



The fight against AMR is urgent and requires immediate action. By understanding its implications, we can work towards effective solutions that protect health and promote sustainable development.




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Diamond Dust Proposed as Geoengineering Solution for Global Warming

 

A new study published in Geophysical Research Letters suggests that diamond dust could be an effective SRM material. The study compared seven compounds and found diamonds to be the most efficient for reflecting solar radiation. Researchers propose spraying five million tonnes of diamond dust annually into the upper atmosphere to achieve a temperature reduction of 1.6 degrees Celsius.

About Geoengineering

Geoengineering involves large-scale interventions to alter the Earth’s climate system. It aims to counteract global warming’s effects. Two main strategies exist: Solar Radiation Management (SRM) and Carbon Dioxide Removal (CDR). SRM focuses on reflecting solar radiation away from Earth, while CDR seeks to remove carbon dioxide from the atmosphere.

Solar Radiation Management Explained

SRM is a key area of interest. It involves deploying materials in the atmosphere or space to reflect sunlight. This can potentially reduce global temperatures. The concept draws inspiration from volcanic eruptions. When volcanoes erupt, they release sulphur dioxide, which forms particles that reflect sunlight. The 1991 Mount Pinatubo eruption is an example, as it temporarily lowered global temperatures by 0.5 degrees Celsius.

Other SRM Materials

Previous studies have considered various materials for SRM, including sulphur, calcium, and sodium chloride. Each has its advantages and drawbacks. Diamonds, however, have emerged as a promising option due to their unique properties.

Carbon Dioxide Removal Technologies

CDR technologies focus on removing carbon dioxide from the atmosphere. Carbon Capture and Sequestration (CCS) is one such method. It captures CO2 emissions from industrial sources and stores them underground. Carbon Capture and Utilisation (CCU) uses captured CO2 for industrial processes. Direct Air Capture (DAC) extracts CO2 directly from the air. While these methods can help reduce atmospheric CO2, they face challenges and scalability issues.

Concerns with Carbon Capture Technologies

CCS technologies are not without flaws. Studies indicate that relying heavily on CCS to meet climate goals may be impractical and costly. The estimated cost of achieving climate targets primarily through CCS could exceed US$30 trillion compared to a focus on renewable energy. Additionally, finding safe storage sites for captured CO2 is becoming increasingly difficult.

The Future of Geoengineering



Despite the challenges, geoengineering remains a crucial area of research. With the visible impacts of climate change, solutions like SRM and CDR are gaining attention. There are no scenarios for meeting climate targets that do not involve some form of these technologies. Continued exploration and careful consideration of the implications are essential for any future implementation.




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Wetlands Vital in Global Biodiversity Strategies

 

The UN Biodiversity Conference is currently underway in Cali, Colombia. A recent assessment by 35 percent ltd, commissioned by Wetlands International, marks the importance of wetlands in National Biodiversity Strategies and Action Plans (NBSAPs). This assessment follows COP15, where nations were urged to revise their biodiversity plans in line with the Kunming-Montreal Global Biodiversity Framework (KMGBF).

Importance of Wetlands

Wetlands are vital ecosystems. They provide essential services such as:Protecting and improving water quality.
Providing habitats for wildlife.
Storing floodwaters.

Maintaining surface water flow during dry periods.

These services support 40 percent of the world’s biodiversity. However, wetlands are disappearing faster than any other ecosystem.

NBSAPs and Wetland Inclusion

Wetlands International’s report, titled Assessing the Inclusion of Wetlands in NBSAPs, reviews how well wetlands are represented in these crucial documents. The analysis includes 24 NBSAPs from 196 countries that are parties to the Convention on Biodiversity. The majority of submissions came from Europe, followed by Asia, Africa, North America, Latin America, the Caribbean, and Oceania.

Key Findings

The report revealed several important findings:83 percent of submitted NBSAPs explicitly mention wetlands, inland waters, or freshwater.
100 percent of submissions from Africa and Oceania included these terms.
Over 90 percent of European nations mentioned wetlands.

Wetlands are included under key targets related to the KMGBF:71 percent of plans articulate specific measures for restoration (Target 2).
50 percent include protections for wetlands (Target 3).

Despite these positive mentions, many NBSAPs lack specific, measurable targets for wetland conservation and restoration.

Specific Wetland Types

The review identified 16 NBSAPs that mentioned specific wetland types, including Mangroves, Rivers, Lakes, Peatlands Mangroves, rivers, and lakes were the most frequently mentioned, indicating their significance for environmental targets. However, major wetland areas like the Amazon River Basin and Hudson Bay Lowland were rarely addressed in national strategies. This oversight is concerning given their importance for biodiversity and climate regulation.

Need for Improvement



The report stresses the need for countries to better integrate wetlands into their biodiversity targets. Specific, measurable goals for wetland restoration and protection are essential. Focusing on key wetland areas will enhance regional and global ecological health.The UN Biodiversity Conference is currently underway in Cali, Colombia. A recent assessment by 35 percent ltd, commissioned by Wetlands International, marks the importance of wetlands in National Biodiversity Strategies and Action Plans (NBSAPs). This assessment follows COP15, where nations were urged to revise their biodiversity plans in line with the Kunming-Montreal Global Biodiversity Framework (KMGBF).







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What is fourth global coral bleaching event (GCBE4)?

The fourth global coral bleaching event (GCBE4) began in January 2023. It is the most extensive and rapid coral bleaching event recorded. According to National Oceanic and Atmospheric Administration (NOAA), 99.9% of coral reefs in the Atlantic Ocean have experienced heat stress. This event has surpassed previous bleaching events from 2014 to 2017 by over 11%.

Comparison with Previous Events

The current event has unfolded in less time than GCBE3, which lasted three years and affected 65.7% of coral reefs. GCBE4 has impacted at least 77% of global reef areas in just 20 months. This rapid increase in bleaching is alarming and unprecedented.

Current Impact and Regional Examples

Reports confirm mass coral bleaching in 74 countries since February 2023. Regions like Palau, Guam, and Israel have documented bleaching. The Caribbean and South China Sea continue to experience high heat stress levels.

Climate Patterns and Their Influence

Strong El Niño events often lead to severe bleaching. However, recent events have shown that bleaching can also occur during La Niña phases. This indicates a shift in ocean temperatures, making reefs vulnerable regardless of the ENSO phase.

Extent of Heat Stress

The overwhelming majority of coral reefs in the Atlantic have faced bleaching-level heat stress. This extreme heat has persisted for nearly two years in some Caribbean areas. The situation is dire, with many corals experiencing ongoing thermal stress.

Future Assessments and Delayed Impact

The full impact of GCBE4 may take years to understand. Scientists need to conduct extensive in-water monitoring and field assessments. These evaluations usually happen months after the bleaching event subsides

.
Coral Mortality Timeline

Coral mortality can begin rapidly during marine heatwaves. Sensitive species may die within days to weeks. However, the complete consequences of bleaching often unfold over one to two years. Corals may become immunocompromised and more susceptible to disease after heat stress.

Historical Context of Coral Mortality

During the 2005 bleaching event in the US Virgin Islands, many corals initially survived but later succumbed to diseases. This led to an important decline in coral cover. Current studies from the Mexican Pacific indicate mortality rates of 50-93% in certain regions.

Call for Action

In light of this extensive coral bleaching, scientists and the UN are advocating for an emergency session on coral reefs. This will take place during the Convention on Biological Diversity summit (COP16) in Cali, Colombia. The urgency reflects the need for immediate action to address the crisis facing coral ecosystems worldwide.


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Expensive Farmed Salmon Threatens Affordable Fish Access Globally

A study published on October 16, 2024, in Science Advances, explores how the rising demand for farmed salmon is making it harder for coastal communities to access affordable fish. The research, led by Patricia Majluf from Cayetano Heredia University, focuses on how small fish, known as forage fish, are being used to make fishmeal and fish oil (FMFO) for aquaculture (fish farming).

Key Issues with Reduction Fisheries

Reduction fisheries are fisheries where small fish, like anchovies or sardines, are caught specifically to be turned into fishmeal and fish oil, rather than being eaten by people. These fisheries make up a large portion of the global fish catch. 12 of the world’s top 20 fisheries target these small species. One of the biggest is the Peruvian anchoveta, which is mostly used to produce FMFO. This has created challenges for local communities who rely on these fish for food.

Impact on Coastal Communities

Many poor coastal communities depend on these small fish for both food and their livelihoods. But because these fish are being used to feed farmed fish, like salmon, instead of being available for local consumption, these communities are struggling to access an affordable source of protein.

Understanding the Fish-in-Fish-out (FIFO) Ratio

The FIFO ratio is used to measure how much wild fish is needed to produce farmed fish. The study points out that some in the aquaculture industry are not fully honest about how much wild fish, like anchoveta, is required to feed farmed fish, particularly carnivorous fish like salmon. While the industry claims they are using less fishmeal in feeds, there is still a high demand for fish oil, especially for farmed salmon, which is eaten in large quantities worldwide.

Concerns About Sustainability

Climate change is making it harder to maintain healthy fish populations, especially important species like the Peruvian anchoveta. Overfishing, particularly catching young fish before they can reproduce, is further harming these populations. This has caused some feed producers to look for other sources, including fish that are typically eaten by people, to maintain the fish oil supply.

Recommendations for the Aquaculture Industry

The study recommends that the aquaculture industry find alternatives to using fishmeal and fish oil in fish feeds. This would help make fish farming more sustainable and ensure that coastal communities can continue to rely on fish as a critical food source. Improving the sustainability of fish feeds is important for both protecting the environment and ensuring that vulnerable communities have access to affordable fish.




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New Temperature Regimes Threaten Tropical Forest Biodiversity Areas

A study published in Conservation Letters shows that up to 66% of Key Biodiversity Areas (KBAs) in tropical forests are now experiencing new, extreme temperature changes. These changes could severely affect the diverse plant and animal life in these critical ecosystems.

What are Key Biodiversity Areas (KBAs)

KBAs are areas that are very important for maintaining global biodiversity. They include land, freshwater, and marine ecosystems. These areas are a top priority in conservation plans, especially in the post-2020 global biodiversity framework, which was adopted in December 2022.

Global Biodiversity Framework

The Kunming-Montreal Global Biodiversity Framework is a plan to stop and reverse biodiversity loss by 2030. One of its goals is to protect at least 30% of the world’s land by 2030, and KBAs are a big part of this effort.

Temperature Changes and Their Impact

The study found that new average annual temperatures have impacted KBAs in tropical forests differently depending on the region:72% in Africa
59% in Latin America
49% in Asia and Oceania

These changing temperatures can threaten species in tropical forests, which are used to very stable climates under the forest canopy.

Challenges for Species

Tropical forests usually have steady, mild temperatures, and many species in these regions have evolved to live under these consistent conditions. Now, with rising temperatures, these species may find it hard to adjust, making them more vulnerable to climate change.

Regional Findings

The study revealed that 2.9% of KBAs in Latin America and 4.9% in Asia and Oceania are experiencing nearly completely new temperature patterns. Areas in Ecuador, Colombia, the Philippines, and Indonesia are particularly affected, while northern Australia’s tropical forests have seen fewer temperature changes.

Protection of KBAs

Currently, about 34% of tropical forest KBAs are not facing these extreme temperature shifts, and more than half of these are protected. However, in Asia and Oceania, 23% of KBAs that have not yet experienced these temperature changes lack protection.

What Needs to be Done

The authors of the study stress the need for ‘climate-smart’ policies to protect these crucial areas. These policies should focus on stopping deforestation, restoring large forest areas, and addressing the effects of climate change and habitat degradation. Without these actions, the biodiversity in affected KBAs could suffer greatly.




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