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The primary causes of global warming include the increase in greenhouse gases such as carbon dioxide, methane, and nitrous oxide due to human activities. Key contributors are the burning of fossil fuels for energy, deforestation, industrial processes, and agricultural practices. These activities trap heat in the atmosphere, leading to a rise in global temperatures.
The UN measures climate change impacts through various assessments and reports, notably from the Intergovernmental Panel on Climate Change (IPCC). These assessments analyze scientific data on temperature changes, sea-level rise, and extreme weather events. They also utilize climate models to predict future impacts and evaluate the effectiveness of mitigation strategies.
The $1.3 trillion figure represents the estimated annual financial investment needed to effectively combat climate change and mitigate its impacts. This funding is crucial for transitioning to renewable energy sources, enhancing infrastructure resilience, and supporting adaptation strategies, especially in vulnerable regions.
Strategies to combat global warming include reducing greenhouse gas emissions through renewable energy adoption, improving energy efficiency, reforestation, and promoting sustainable agriculture. International agreements like the Paris Agreement aim to limit global temperature increases and encourage nations to set and achieve emission reduction targets.
Nepal, despite contributing minimally to global emissions, faces severe consequences from global warming, including increased flooding, landslides, and glacial melt. These impacts threaten agriculture, water resources, and livelihoods, highlighting the disproportionate effects of climate change on developing nations.
The 'danger zone' refers to a global temperature increase beyond 1.5 to 2 degrees Celsius above pre-industrial levels, which is associated with severe climate impacts such as extreme weather, sea-level rise, and biodiversity loss. Staying below this threshold is critical to avoid catastrophic consequences.
Key historical agreements addressing climate change include the Kyoto Protocol (1997), which set binding emission reduction targets for developed countries, and the Paris Agreement (2015), which aims to limit global warming to well below 2 degrees Celsius through voluntary commitments from all nations.
Developed nations historically contribute a larger share of greenhouse gas emissions due to industrialization, while developing nations, although currently lower in total emissions, are rapidly increasing their emissions due to economic growth. This disparity raises ethical concerns regarding responsibility and support for climate action.
Renewable energies, such as solar, wind, and hydroelectric power, play a crucial role in climate action by providing cleaner alternatives to fossil fuels. They help reduce greenhouse gas emissions, enhance energy security, and support sustainable development, making them essential for meeting global climate targets.
Inaction on climate change could lead to severe consequences, including more frequent and intense natural disasters, loss of biodiversity, food and water scarcity, and displacement of populations. Economic costs could also escalate, with significant impacts on health, infrastructure, and global stability.
