Word: emitted
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...area. In addition, the problems resulting from deforestation (soil erosion, flooding, global warming, reduced fisheries etc.) will cost an inestimable amount of money, especially for those regions that rely economically on their renewable natural resources. Even planting new trees will not solve this problem; new trees actually emit more carbon dioxide than they absorb and do not have the root structure to as effectively prevent erosion or the height to provide a sufficient canopy for life underneath. The economic benefits of logging are uncertain at best, while the environmental effects will certainly harm the long-term interests of the region...
Natsource trades not only standard commodities like coal and natural gas but also a new currency known as greenhouse-gas credits. These credits represent, in effect, the right to emit a certain amount of carbon dioxide, methane or other gases thought to contribute to global warming. Such credits trade in earnest in nations like Britain and Denmark, which have capped emissions from such sources as factories and power plants. And the credits are trading on an experimental basis in the U.S., as industries anticipate the eventual imposition of similar emission limits here...
...dioxide was traded among companies in the U.S. and Europe. The World Bank's Prototype Carbon Fund, which helps countries preserve forest and reduce CO2 emissions, says the number of greenhouse-gas trades and the volume of gas affected will double this year. Experts predict that the right to emit a ton of carbon dioxide, which costs between $3.50 and $6 if purchased in bulk today, will cost between $7 and $12 by 2005. That would make the global market for greenhouse-gas credits worth well over $3 billion a year...
...approach to locating planets, called the transit technique, depends upon observing changes in the level of brightness of light that distant stars emit...
Sandel questioned the morality of emissions trading, a system of trading entitlement for different nations to emit greenhouse gases...