... dioxide, methane, nitrous oxide, and ozone. Certain human activities add to the levels of most of these naturally occurring gases. Carbon dioxide is released to the atmosphere when solid waste, fossil fuels (oil, natural gas, and coal), and wood and wood products are burned. Methane is emitted during the production and transport of coal, natural gas, and oil. Methane emissions also result ... 15 percent (Mullin, 18). These increases have enhanced the heat-trapping capability of the earth's atmosphere. Scientists believe that the combustion of fossil fuels and other human activities are ...

• Word Count: 1142
• Approx Pages: 5
• Has Bibliography

... rock bottom, they bounce; but the current philosophy in Washington seems to be that when you hit rock bottom, drill. Even as the environmental consequences of drilling for and burning fossil fuels at an unsustainable rate mount alarmingly quickly, clean energy research and development is still relatively under-funded and overlooked as it has been for decades. It begs the question: What ... ...

• Word Count: 706
• Approx Pages: 3
• Has Bibliography
• Grade Level: Undergraduate

... rock bottom, they bounce; but the current philosophy in Washington seems to be that when you hit rock bottom, drill. Even as the environmental consequences of drilling for and burning fossil fuels at an unsustainable rate mount alarmingly quickly, clean energy research and development is still relatively under-funded and overlooked as it has been for decades. It begs the question: What ... ...

• Word Count: 708
• Approx Pages: 3
• Has Bibliography
• Grade Level: Undergraduate

... is why we have had so many climate changes. In fact, in recent decades there has been a global increase in atmospheric carbon dioxide, largely as a result of the burning of fossil fuels. If the many other determinates of the earth's present global climate remains more or less constant, the CO2 increase should raise the average temperature at the earth's surface (Bilger 61 ... ...

• Word Count: 1009
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School