[单项选择]Climate Change：The Long Reach 1 Earth is warming Sea levels are rising. There’s more carbon in the air and Arictic ice is melting faster than at any time in recorded history. Scientists who study the environment to better gauge（评估） Earth’s future climate now argue that these changes may not reverse for a very long time. 2 People burn fossil fuels like coal and oil for energy. That burning releases carbon dioxide，a colorless gas. In the air，this gas traps heat at Earth’s surface. And the more carbon dioxide released，the more the planet warms. If current consumption of fossil fuels doesn’t slow，the long-term climate impacts could last thousands of years—and be more severe than scientists had been expecting.Climatologist Richard Zeebe of the University of Hawaii at Manoa offers this conclusion in a new paper. 3 Most climate-change studies look at what’s going to happen in the next century or so.During that time，changes in the planet’s environment could

[单项选择]Climate Change：The Long Reach 1 Earth is warming Sea levels are rising. There’s more carbon in the air and Arictic ice is melting faster than at any time in recorded history. Scientists who study the environment to better gauge（评估） Earth’s future climate now argue that these changes may not reverse for a very long time. 2 People burn fossil fuels like coal and oil for energy. That burning releases carbon dioxide，a colorless gas. In the air，this gas traps heat at Earth’s surface. And the more carbon dioxide released，the more the planet warms. If current consumption of fossil fuels doesn’t slow，the long-term climate impacts could last thousands of years—and be more severe than scientists had been expecting.Climatologist Richard Zeebe of the University of Hawaii at Manoa offers this conclusion in a new paper. 3 Most climate-change studies look at what’s going to happen in the next century or so.During that time，changes in the planet’s environment could

[单项选择]Climate Change : The Long Reach 　　1 . Earth is warming. Sea levels are rising. There ‘s more carbon in the air, and Arctic ice　is melting faster than at any time in recorded history. Scientists who study the environment to　better gauge (评估) .Earth’s future climate now argue that these changes may not reverse for a very long time . 　　2 . People burn fossil fuels like coal and oil for energy. That burning releases carbon dioxide, a colorless gas . In the air , this gas traps heat at Earth’s surface . And the more carbon dioxide　released , the more the planet warms . If current consumption of fossil fuels doesn’t slow ,　the long-term climate impacts could last thousands of years-and be more severe than scientists had been expecting. Climatologist Richard Zeebe of the University of Hawaii at Manoa offers this conclusion in a new paper. 　　3. Most climate-change studies look at what’s going to happen in the next century or so .　During that time, changes in the planet’s environment could n

[填空题]Climate Change
Scientists predict increasing droughts, floods and extreme weather and say there is growing evidence that human activities are to blame.
What Is Climate Change
The planet’s climate is constantly changing. The global average temperature is currently in the region of 15℃. Geological and other evidence suggests that, in the past, this average may have been as high as 27℃ and as low as 7℃.
But scientists are concerned that the natural fluctuation (波动) has been overtaken by a rapid human-induced warming that has serious implications for the stability of the climate on which much life on the planet depends.
What Is the "Greenhouse Effect"
The greenhouse effect refers to the role played by gases which effectively trap energy from the Sun in the Earth’s atmosphere. Without them, the planet would be too cold to sustain life as we know it.
The most important of these gases in the natural greenhouse effect is water vap