The correct answer is C. Ozone.
Greenhouse gases are gases that trap heat in the atmosphere, causing the planet to warm. The main greenhouse gases are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.
Water vapor is the most abundant greenhouse gas, but it is not the most important contributor to climate change. Carbon dioxide is the second most abundant greenhouse gas, and it is the most important contributor to climate change. Methane is a greenhouse gas that is about 25 times more potent than carbon dioxide. Nitrous oxide is a greenhouse gas that is about 300 times more potent than carbon dioxide. Ozone is a greenhouse gas that is about 100 times more potent than carbon dioxide, but it is not a major contributor to climate change because it is not very abundant in the atmosphere.
The main sources of greenhouse gases are:
- Human activities, such as burning fossil fuels, deforestation, and agriculture.
- Natural processes, such as volcanic eruptions and the decay of organic matter.
The main effects of greenhouse gases are:
- Climate change, which is the long-term warming of the Earth’s climate.
- Sea level rise, which is the increase in the average height of the Earth’s oceans.
- Extreme weather events, such as heat waves, droughts, floods, and storms.
The main ways to reduce greenhouse gas emissions are:
- Switch to renewable energy sources, such as solar and wind power.
- Improve energy efficiency.
- Reduce deforestation.
- Change agricultural practices.