This document discusses global warming, defining it as an increase in the average temperature of the global surface that was discovered by Smith and caused by too much carbon dioxide. It explains that greenhouse gases like carbon dioxide trap heat from the sun, causing a greenhouse effect and rising global temperatures that lead to drier conditions, harm sea life, and raise sea levels. Some ways to prevent further global warming mentioned are planting trees, conserving energy, using energy efficient products, reducing car use, and reducing aerosols through reducing, reusing, and recycling.