Final answer:
Increased CO2 levels are contributing to climate change by trapping heat in the atmosphere and causing a rise in global temperatures. This can lead to changes in weather patterns, precipitation levels, and impact biodiversity and ecosystems.
Step-by-step explanation:
An increase in carbon dioxide levels in the atmosphere, primarily due to the burning of fossil fuels, is contributing to climate change. This increased concentration of CO2 acts as a greenhouse gas, trapping heat in the atmosphere and leading to a rise in global temperatures. The rising temperatures can result in changes in weather patterns, precipitation levels, and habitats, impacting biodiversity and ecosystems.