Climate Change

Climate change refers to long-term variations in any measure of worldwide climate, such as temperature, precipitation, wind patterns, cloud cover and a variety of other factors over more than a decade. One example of climate change is global warming, the worldwide change in climate, specifically an increase in global average temperatures, caused by the collective buildup of greenhouse gases (e.g., water vapor, carbon dioxide, methane, nitrous oxide, ozone) in Earth's atmosphere, primarily due to human activity. According to the Environmental Protection Agency (EPA), "scientists are certain that human activities are changing the composition of the atmosphere, and that increasing the concentration of greenhouse gases will change the planet's climate."