7.1.2.5. Climate Change

Climate change refers to long-term shifts in temperature, precipitation, and weather patterns, primarily due to human activities increasing the concentration of greenhouse gases in the atmosphere.

• The main greenhouse gases are carbon dioxide (CO₂), methane (CH₄), nitrous oxide (N₂O), and fluorinated gases.
• The burning of fossil fuels (coal, oil, and natural gas) for energy is the largest source of CO₂ emissions.

Climate change is a term used to describe significant changes in global temperatures and weather patterns over time. Although climate change is a natural process, human activities have accelerated this transformation, especially since the industrial revolution. The main drivers are greenhouse gases, such as carbon dioxide from burning coal, oil, and gas. These gases trap heat in the atmosphere, leading to a warming effect that alters climates worldwide.

Think of the Earth as a greenhouse. Normally, a greenhouse lets sunlight in and prevents some of that heat from escaping. By burning fossil fuels, it's like adding more glass to the greenhouse, trapping even more heat. Just like a plant in a greenhouse can wilt if it gets too hot, our ecosystems and communities can suffer due to rising temperatures.

• Rising global temperatures causing melting glaciers and polar ice caps.
• Sea-level rise threatening coastal communities.
• More frequent and severe extreme weather events like hurricanes, heatwaves, and droughts.
• Disruption to agriculture, water supplies, and ecosystems.
• Increased health risks, particularly for vulnerable populations.

The impacts of climate change are widespread and severe. As temperatures rise globally, glaciers and ice caps are melting, contributing to increased sea levels. Coastal communities face the threat of flooding and erosion. Additionally, we see an increase in extreme weather events, such as hurricanes, heatwaves, and droughts, leading to further challenges in food supply, water availability, and overall ecosystem health. Vulnerable populations may suffer the most, facing health risks and economic hardships.

Imagine living in a house that starts to leak every time it rains. At first, it’s just a few drops, but over time, as the roof weakens, the leaks become worse, damaging everything inside. Similarly, climate change acts like that leaky roof, gradually intensifying problems that affect our environment, health, and way of life.

The international community has taken various steps to mitigate and adapt to climate change:

1. United Nations Framework Convention on Climate Change (UNFCCC) Established in 1992, the UNFCCC is a global treaty aiming to stabilize greenhouse gas concentrations to prevent dangerous human interference with the climate system.
2. Kyoto Protocol (1997)

• The first binding international agreement setting emission reduction targets for developed countries.
• Established mechanisms like Emissions Trading and Clean Development Mechanism (CDM) to promote cost-effective reductions.

3. Paris Agreement (2015)

• A landmark accord signed by 196 countries to limit global warming to well below 2°C above pre-industrial levels, pursuing efforts to limit it to 1.5°C.
• Countries submit nationally determined contributions (NDCs) detailing their emission reduction plans.
• Emphasizes transparency, financial support to developing countries, and global cooperation.

4. Climate Finance Financial support provided to developing nations to invest in renewable energy, climate resilience, and sustainable infrastructure.

In response to the climate crisis, global agencies and nations have come together to create agreements that guide action on climate change. The UNFCCC was established to address the worsening climate situation by stabilizing greenhouse gas levels. The Kyoto Protocol followed as the first binding agreement, targeting emission cuts from developed countries, while the Paris Agreement further strengthened international commitments to limit global warming. Climate financing supports developing countries in their transition to greener economies.

Consider a group of friends planning a road trip. They make agreements on how far they will drive each day and what car snacks to bring. If one friend drives too fast, they disrupt the plan. Similarly, countries must collaborate, set limits, and financially support each other, like friends on a road trip, to ensure we reach our climate goals without harming the 'journey' or the planet.

• Mitigation: Reducing emissions through renewable energy, energy efficiency, reforestation, and sustainable transport.
• Adaptation: Building resilience to climate impacts through improved infrastructure, disaster preparedness, and sustainable agriculture.

To combat climate change, we use two primary strategies: mitigation and adaptation. Mitigation focuses on reducing the emissions of greenhouse gases through shifts to renewable energy sources, improving energy efficiency, and practices like reforestation. Conversely, adaptation involves making adjustments to our systems and practices to handle the changes already underway—such as enhancing infrastructure to withstand severe weather or developing agricultural methods that consider changing climate conditions.

Imagine you're preparing for a winter storm. Mitigation is like insulating your home to keep it warm, while adaptation is making sure you have enough supplies to endure the storm. Both strategies work together to improve your comfort and safety during harsh conditions, similar to how we tackle climate change.

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