Word: space
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Dates: during 1980-1989
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...rays to warm the earth's surface. But when the surface gives off its excess heat, it does so not with visible light but with infrared radiation. And since CO2 absorbs infrared rays, some of the excess heat stays in the atmosphere rather than escaping into space. How much heat is retained depends on how much...
...ancient layers of snow. They have also looked at fossilized plant tissues for clues as to how warm the air was during the same period. The conclusion: CO2 levels and global temperatures have risen and fallen together, over tens of thousands of years. And there is evidence from space: Mars, which has little CO2 in its atmosphere, has a surface temperature that reaches -24 degrees F at best, while Venus, with lots of CO2, is a hellish 850 degrees...
Ultimately, though, the world must move away from fossil fuels for most of its energy needs. Said Berrien Moore, director of the Institute for the Study of the Earth, Oceans and Space at the University of New Hampshire: "Even if you cut emissions of CO2 in half, the atmospheric concentration will keep going up. You're still adding CO2 faster than you're withdrawing it, so the balance keeps rising...
...state of the world. Such an umbrella program could pool the results of hundreds of existing research efforts. A prime candidate for this program would be the Mission to Planet Earth, recommended by former astronaut Sally Ride, which would use NASA facilities to study the earth from space. In addition to improving knowledge of the earth's ills, an International Earthwatch Program could provide the basis for a widespread awareness-building campaign aimed at preparing public opinion for the sacrifices and life-style changes that will be necessary in the coming decades. Environmental education programs should be immediately introduced into...
...million square in terms of time and space...