Part 1 of Essay
Earth is the only planet that we know of that has the right conditions to support life. Because of it’s perfect distance from the sun, Earth has an average temperature of 60°F, making it an ideal place for many types of life to thrive in. However, the temperature would not be so ideal if we did not have an atmosphe ....

Part 2 of Essay
.... increasing the average heat levels. Scientists predict that the average temperature will rise 1.6 – 6.3°F by the year 2100, which could wreak havoc with climates around the world. Why are greenhouse gas concentrations increasing? Scientists generally believe that the combustion of fossil fuels and other human activities are the primary reason for the increased concentration of carbon dioxide. Energy burned to run cars and trucks, heat homes and businesses, and power factories is responsible for about 80% o ....