What’s wrong with our weather (2)
How? Carbon dioxide in our atmosphere, like the glass in a greenhouse, lets sunlight pass through, then catches and retains some of the sunlight’s energy as heat. This greenhouse effect warms the earth’s climate. If co2 and other greenhouse gases vanished tomorrow, the earth would become overnight a frozen lifeless world like mars. But if these gases build up too much in the atmosphere, wholesale replica designer handbags, we get overheated. And in fact, all these gasses have been increasing since the start of the industrial revolution.
Atmospheric scientists say that co2 causes about half the greenhouse effect. Each year our skies receive five billion tons of co2 from the burning of fossil fuels, and up to half as much from the clearing and burning of almost 33 million acres of tropical forest. At the present rate of increase, the amount of this gas alone could double during the next century.
One scientist calculates that the earth’s average temperature already has risen during this century by one degree F., wholesale designer handbags, almost certainly because of the increase in greenhouse gases. Even without further atmospheric pollution, he estimates that trapped heat from gases we are already put in our skies will boost global temperatures antoerh one to five degrees over 1980 levels in the next century.
A warming of just a few degrees seems small until we realize that it approximates the rise in temperature that ended the last major ice age 100,000 years ago, if we don’t slow the rate of warming, researchers fear that droughts and forest fires will become normal summer weather, while giant hurricanes will hit farther north and during more months of the year. And that’s just the beginning. As the warming continues, wholesale coach handbags, according to this theory, polar icecaps will melt and ocean levels will rise by up to four feet during the next century, threatening such cities as New York, London, Beijing, and Seoul. Farmland will be devastated and water supplies contaminated.
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