Monday, 18 January 2016

Greenhouse Effect ( The Rising Problem )

The Greenhouse Effect is the result of the atmosphere's absorption of long-wave radiation emitted by Earth. Among the atmosphere constituents, carbon dioxide absorbs the largest proportion of that radiation. Thus, when the carbon dioxide content of air changes, a corresponding increase or decrease in the greenhouse effect occurs. The natural supply of carbon dioxide has probably varied little over the past several million years, but over the past 200 years human beings have increasingly acquired the capacity to alter this balance.
In particular, the coming of the Industrial Revolution in the late 18th century has been accompanied by an ever greater consumption of coal, oil and natural gas. The burning of these fossil fuels products enormous quantities of carbon dioxide, and the global levels of this variable atmospheric gas have risen substantially in recent decades. Although no firm conclusions have emerged from various scientific studies on the possible climate and other environmental consequences of a heightened greenhouse effect, the evidence gathered to date suggests that higher level, the evidence gathered to date suggest that higher levels of atmospheric carbon dioxide may be linked to the increase in global temperatures.
Scientists who subscribe to the greenhouse theory of climate change have delivered forecasts of future environment conditions. Some predict an intensification of the global warming, with average temperatures steadily rising by as much as 1.0 to 4.5 degree C by 2050. Others forecast a different scenario that involves the oceans. They argue that much of the increased heat of the atmosphere today is really being absorbed and temporarily stored by the sea. Over the next few years, however, they expect that heat to be released in vast quantities, thereby causing sudden, significant climate change without warming.
These prognostications have led some to consider other implications of such greenhouse warming like dramatic alteration of weather patterns, intensification of storm systems, re-direction of ocean currents and severe coastal flooding as melting polar ice-caps can global sea levels by as much as 5 feet by 2050.

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