The document discusses global warming, including its causes, consequences, and preventative measures. It states that global warming is caused by both natural factors like the greenhouse effect as well as man-made causes from pollution and burning fossil fuels. This results in rising sea levels, melting polar ice caps, changes in animal behavior, and odd climatic changes. The document also covers ozone layer depletion and how damage to the ozone layer from human activity could have catastrophic effects by allowing more ultraviolet rays from the sun to reach the planet.