I N T R O D U C T I O N For hundreds of years, climates on earth have gone through great changes. The changes are caused by many activities that have occurred and are presently occurring on earth. Increasing evidence indicates that human impact on the environment is causing local and perhaps worldwide changes in climate. At various times, glaciers have moved down across the continents into regions that are now warm. This …showed first 75 words of 2731 total…

…showed last 75 words of 2731 total…as well as health problems are just a few of the many, many results of global warming. We as a nation must strive and work together to shape the fate of our living earth. Global warming and the greenhouse effect are problems that need serious and critical attention. Even though the problems may be more severe in one region than another in the end it will affect and harm all of us in the end.