Word: co2
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Dates: during 2000-2009
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...true that as temperatures warm, there is likely to be a temporary beneficial effect on agriculture. Like people, plants generally prefer warmth to cold, and they may flourish with rising levels of CO2. But research from Wolfram Schlenker at Columbia University shows that, as average temperatures continue to warm, those benefits dwindle and eventually reverse, and crop yields begin to decline. "It simply becomes too hot for the growing plants," says Naylor. "The heat damages the crops' ability to produce enough yield...
...week-long U.N. climate-change summit in Poznan, Poland, which concluded on Dec. 12, the Nobel laureate warned delegates from over 190 countries that the time for idle talk on global warming was over. "We now face a crisis that makes it abundantly clear that increased CO2 emissions anywhere are a threat to the integrity of this planet's climate balance everywhere," he said. "As a result the old divide between the North and South, between developed and developing countries, is a divide that must become obsolete...
...technological progress is translating into environmental gains, take a trip to the research campus of Lafarge, just outside the French city of Lyons. The world's largest cement company, with sales of $22.5 billion in 2007, Lafarge has set itself the goal by 2010 of cutting its net CO2 emissions for every ton of cement it produces to 20% below the 1990 level. But it is also steaming ahead with research efforts into smarter, stronger and less polluting products, including ultra-high-performance concrete. Research director Casanova traces the path of innovation back to the 1980s, when the first...
...Carbon dioxide levels are now higher than they “probably [have been] during the last 20 million years.” And, the report noted glumly, with China and India consuming more and more, the problem is getting worse instead of better. The new data shows that CO2 levels have only risen faster since the turn of the century. So much for compact fluorescents and hybrid Priuses—apparently, the world is still going...
...sense of how technological progress is translating into environmental gains, take a trip to Lafarge's research campus, just outside the French city of Lyons. The world's largest cement company, Lafarge has set itself a goal: by 2010, it will cut its net CO2 emissions for every ton of cement it produces to 20% below the 1990 level. But it is also steaming ahead with research into smarter, stronger and less polluting products, including ultra-high-performance concrete. Research director Casanova traces the path of innovation back to the 1980s, when the first big gains were made in increasing...