Final answer:
Increased levels of CO2 in the Earth's atmosphere, primarily due to burning fossil fuels, is resulting in climate change, impacting biodiversity and ecosystems.
Step-by-step explanation:
The increased levels of CO2 in the Earth's atmosphere, primarily due to burning fossil fuels, is resulting in climate change. Carbon dioxide is a greenhouse gas that traps heat in the atmosphere, leading to an increase in global temperature. This temperature rise can cause changes in weather patterns, precipitation, and environmental conditions, impacting biodiversity and ecosystems.