Global Warming

Global Warming is the observed century-scale rise inthe average temperature of Earth's climate system. The term "global warming" is used to refer to increases in average temperature of the air and sea at Earth's surface. Since the early 20th century, the global increases in average temperature has increased about 0.8ºC (1.4ºF), with about two-thirds of the increase occuring since 1980. Each of the last three decades has been successively warmer at the Earth's surface than any preceding decade since 1850.

Scientific understand of the cause of global warming has been increasing. In its fourth assessment of the relevant scuentific literature, the Intergovernmental Panel on Climate Chang (IPCC) reported that scientists were more than 90& certain that most of global warming was being caused by increasing concentrations of greenhouse gases produced by human activities. In 2010 that finding was recognized by the national science academies of all major industrialized nations.

Affirming these findings in 2013, the IPCC stated that the largest driver of global warming is carbon dioxide (CO2) emissions from fossil fuel combustion, cement production and land use changes such as deforestation. Its 2013 report states:
 * Human influence has been detected in warming of the atmosphere and the ocean, in changes in the global water cycle, in reductions in snow and ice, in global mean sea level rise, and in changes in some climate extremes. It is extremely likely (95-100%) that human influence has been the dominant cause of the observed warming since the mid-20th century.
 * IPCC AR5 WG1 Summary for Policymakers

Earth in 2075
As of 2075, global warming has caused the ice caps at the polar regions to melting, causing a global flood. The increased water levels have caused many problems, including submerged cities and deaths.

Not only have water levels heightened, but the heat of the world has increased, making it hard for animals to live above water.

It has been predicted that the Earth's polar regions have melted and flooded over the land approximately three times, and the fourth time is currently in progression.