TOP 100 CAMPING SITES
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| Is 350 the right number to stop climate change? (Hint: Think greenhouse gases) What is the "right" level of carbon dioxide concentrations in the atmosphere to prevent "dangerous" interference with the climate? In the last two centuries, concentrations have risen to roughly 387 parts per million--and are rising by roughly 2 ppm per year thanks to the more than 30 billion metric tons of CO2 humans put into the atmosphere annually through things like burning fossil fuels and cutting down trees. (That's up from 280 ppm for all of recorded history before the Industrial Revolution.) [More] rss.sciam.com |
How the Loss of Peat Lands Affects Greenhouse Gas Buildup Dear EarthTalk: Is it true that the loss of the world’s peatlands is a major factor in the build-up of greenhouse gases in the atmosphere. If so, what can be done about it? -- Larissa S., Las Vegas, NV [More] rss.sciam.com |
U.S. and China Meet on Climate Change President Obama opened high-level U.S.-China meetings in Washington today by underscoring the need for enhanced cooperation between the countries -- the world's largest greenhouse gas emitters -- on low-carbon energy sources."Let's be frank: Neither of us profits from a growing dependence on foreign oil, nor can we spare our people from the ravages of climate change unless we cooperate," Obama said. "Common sense calls upon us to act in concert." [More] rss.sciam.com |
Norman Borlaug: wheat breeder who averted famine with "Green Revolution" Norman Borlaug went from a small farm in Iowa to feeding half the world, thanks to a lifelong interest in tinkering with the genetic design of wheat. He passed away on September 12 from cancer at the ripe age of 95 and the question remains: is the Green Revolution dead too? [More] rss.sciam.com |
Sinking Global Warming: Is There a Reliable Way to Track Atmospheric Carbon Dioxide Levels? The planet soaks up excess carbon dioxide via oceans, plants and soils, among other natural systems, locking away some of the greenhouse gases emitted by burning fossil fuels . In fact, every year these natural "sinks" absorb a larger and larger tonnage of emissions--but thanks to the increasing amount of CO 2 and other greenhouse gases dumped in the atmosphere by human activity, the proportion that is reabsorbed is beginning to dwindle, according to new studies. [More] rss.sciam.com |