Part 1 of Essay
As the world's expanding population burns large quantities of fossil fuels and simultaneously cuts down large expanses of forests worldwide, the concentrations of CO2 and other greenhouse gases are building up in the atmosphere. "The green house effect is the (imperfect) analogy used to explain the atmospheric phenomenon t ....

Part 2 of Essay
.... Human and ecological systems are already vulnerable to a range of environmental pressures, including climate extremes and variability. Global warming is likely to amplify the effects of other pressures and to disrupt our lives in numerous ways. "Melting icebergs and expanding oceans may cause floods." The Intergovernmental Panel on Climate Change (IPCC) predicts that there will be an increase in sea level by the year 2100 of 1.5 feet . "Twenty Five percent of the world’s populatio ....