Science Olympiad Green Generation Practice Test 2026 – Comprehensive Exam Prep

Fossil fuels contribute to climate change primarily through the release of greenhouse gases when they are burned for energy. When coal, oil, or natural gas is combusted, it emits carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) into the atmosphere. These gases are known for trapping heat from the sun, leading to the greenhouse effect, which causes the Earth's average temperature to rise and contributes to global warming. This process significantly impacts weather patterns, sea levels, and biodiversity.

The understanding of why other options do not contribute to climate change is also important. Fossil fuels are not renewable energy sources, which are those that can be replenished naturally, like solar or wind power. Additionally, burning fossil fuels does not release oxygen; rather, it consumes oxygen during combustion. Lastly, while carbon sequestration is a method of capturing and storing carbon dioxide in the soil or other reservoirs, it does not apply to fossil fuels directly, as they primarily emit carbon when used.