also play a he Earth\'s at of visible and t reaches the Earth\'s su (trapped) Ve

Question

also play a he Earth's at of visible and t reaches the Earth's su (trapped) Venus hich approaching 850 F. amounts of it to retain more Ehe Earthkan and governments through and natumosphere. 10% increase in the am As fossil fuels changes dras Teric carbon dioxide in the la. ists are world. Many, elioxide he 21st is shown the carbon di content in first yea of the 20th century estimate. e by 2°C. In temperate h Figure 11.17 According one temperature rise would save amou such as Europe and the United C a of the of dollars per year Unfortunately, it wo also ment f raising he level of ice from Greenland rise would also increase the and sub. and destroying many coastal reg A C yiel ds tropical of drougi already temperatures might ranges. sible for certain plants and a s to survive in into the atmosphere each At present, about 3 x 10" tons of released as the burning of fossil year. Most this gas results from man activities such Anoth greenhouse fuels, the cutting of forests, and manufacturing proces process of cows and other methane (OH), which is released in digestive stomach called the ruminants. This gas originates from that part of the animal's of this where cellulose is digested. Termites are also major producers (SO, Finally, greenhouse gases such as nitrous oxide (N2O) and sulfur dio are increasing due to automobile and industrial pollution. or not, there is Whether the increasing gree gases are responsible vincing evidence that global warming is under way. The evidence comes from the melting of ice in Antarctica and the retreat of glaciers at widely scattered sites throughout the world (see Fig. 11.18). For example, satellite images of Antarctica Ross Island completely surrounded by water for the first time since maps were made, about 100 years ago. Previously, the island was connected to the mainland by an ice bridge. In addition, at various places across the continent, ice shelves are retreating, some at a rapid rat Perhaps at no place in the world are glaciers monitored with greater interest than in Switzerland. There, it is found that the Alps have lost about 50% oftheir lation eat The 11.2

Explanation / Answer

Initially

CO2 in 1960 --> ppm = 300

CO2 in 2000--> ppm = 400

find relative ratio

(400)/300 = 1.33 more

or 33% extra

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