Greenhouse Effect Natural Event Gases Trap Heat In Close To The Earth Greenhouse Gases Natural Event Gases Trap Heat In Close To The Earth Without these the Earth would be too cold for life. But…you don’t want too much of a good thing Naturally Occurring Greenhouse Gases Water Vapor Carbon Dioxide

Too Many Greenhouse Gases Cause Global Warming Too many of these can increase temperatures around the globe. Human’s have increased greenhouse gas emissions. Increase in fossil fuel burning; Cars and Electricity Almost Everything that Requires Energy emits Greenhouse Gases

Is It Really Happening? YES!!! Scientists agree that global warming is occurring ….How Do We Know? Temperatures have increased significantly over the past 200 yrs. Earlier timing of spring events Upward shifts in plant and animal ranges Rise In Sea Levels Global Warming Is Linked to Human Activities