global warming

eThe phrase global warming refers to the documented historical warming of the Earth's surface based upon worldwide temperature records that have been maintained by humans since the 1880s.It is the increase in the average temperature of the Earth's near-surface air and oceans.In the last 100 years, this temperature increased by about 0.8 °C (1.4 °F) with about two thirds of the increase occurring over just the last three decades.According to the exponentss of the concept,the likely effects of a further warming at the same rate include a rise in sea levels,change in the amount and pattern of precipitation,a probable expansion of subtropical deserts,more frequent occurrence of extreme weather events including heatwaves, droughts and heavy rainfall events, species extinctions due to shifting temperature regimes and changes in agricultural yields.Although there has been a controversy, significantly more pronounced in the popular media than in the scientific literature,regarding the nature, causes, and consequences of global warmin,there is a strong consensus in the scientific literature that global surface temperatures have increased in recent decades and that the trend is caused mainly by human-induced emissions of greenhouse gases. No scientific body of national or international standing disagrees with this view,though a few organisations hold non-committal positions

while the proponents of global warming strongly believe that it is a result of human activities,its skeptics argue that natural climate fluctuation, not human activity, is responsible for the past century’s rising temperatures. According to S. Fred Singer, a former professor of environmental sciences at the University of Virginia, the earth’s climate has never been steady and has continually warmed and cooled over the course of geologic time without any assistance from human activity. According to him the human component [in recent global warming] is thought to be quite small and the climate rather