Word: co2
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Dates: during 2000-2009
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...thin solar cells that will be cheap to produce and could turn every house into its own electricity supplier. These ventures, along with many others, are beginning to draw the outlines of a world in which energy use keeps rising and, though fossil fuels remain an important power source, CO2 levels in the atmosphere actually begin to drop...
That's extraordinarily good news for China, whose gigantic size, rapid industrialization and huge domestic coal reserves threaten to pump cataclysmic amounts of CO2 into the air over the next century. While scaling fuel cells down to fit inside cars and trucks has been a challenge, scaling them up or linking them together to run factories and power plants should be no problem...
...danger in pulling hydrogen from fossil fuels is that it leaves carbon dioxide behind. If the CO2 is simply vented into the atmosphere, global warming will be as big a problem as ever. There is an alternative though: pump it into the ground. In Norway, for example, the energy company Norsk Hydro is building a power plant that will be fueled with hydrogen drawn from natural gas. The CO2 that's left over will be reinjected into an oil field on the continental shelf. Not only will this take the carbon dioxide out of circulation but it will also pressurize...
...tons of carbon dioxide that are emitted every year in the course of our daily life. Driving a car, switching on a light, working in a factory, fertilizing a field all contribute to the atmosphere's growing burden of heat-trapping gases. Unless we start to control emissions of CO2 and similar compounds, global mean temperatures will probably rise somewhere between 2[degrees]F and 7[degrees]F by the end of the next century; even the low end of that spectrum could set the stage for a lot of meteorological mischief. Among other things, the higher the temperature...