If temperatures continued to rise, he warned, the earth would face catastrophic climate changes that would adversely affect the environment and human health.
Initially, most climate researchers were skeptical about Hansen’s warning. It was true that carbon dioxide levels had increased by about 30 percent since the mid-1700s, when the Industrial Revolution began; it was also true that the average world temperature had risen by one degree Fahrenheit (F) during the twentieth century—the largest increase of any century during the past millenium... displayed 300 characters
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Yet the earth’s climate had been prone to fluctuations over the past several hundred years, many climatologists maintained. The one degree temperature change could be attributed to the natural variability of the planet’s weather.
As scientists conducted more climatological research, however, data supporting Arrhenius’s global warming theory mounted... displayed next 300 characters
Global warming is a danger to a human's health. Its affect on climate can adversely affect humans. Plagues have been attributed to global warming. An increase in temperature can result in a longer life cycle for diseases or the agents spreading them...
Climate change is a long-standing phenomenon, as the mix of the various gases that make up the earth's atmosphere have changed over long periods of time, so average global temperatures have fluctuated...
The first obstacle would be trying to get an agreement on a framework. In 1988, the Intergovernmental Panel on Climate Change was created by the United Nations Environment Programme and the World Meterological Organization to assess the scientific knowledge on global warming...
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