Changes in the Atmosphere

Today, Earth’s atmosphere is very different from the atmosphere that first formed. Earth’s atmosphere goes through natural changes over time, but scientists have mounting evidence that humans are also causing Earth’s climate to change. The burning of fossil fuels creates air pollution that results in human-caused climatic changes, such as the formation of acid precipitation, the breaking down of the ozone layer, and global warming. In this topic, you will learn about each of these atmospheric changes and their consequences.

Essential Questions

• What causes the climate to change naturally?
• How are human activities influencing climate change?
• What are the causes and effects of global warming?