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Tagged : proceedings-of-the-national-academy-of-sciences


Satellite study reveals threat to boreal forests

May 10th, 2010

While concern for forest loss commonly focuses on rain forests, satellite imagery provides the basis for a new study that concludes that the greatest loss from 2000 to 2005 actually occurred in boreal forests in places like North America.

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Study finds catch shares improve consistency, not health, of fisheries

December 22nd, 2009

From Green Right Now Reports

Catch share programs result in more consistent and predictable fisheries but do not necessarily improve ecological conditions, according to a new study published online this week by the journal Proceedings of the National Academy of Sciences.

Employed by nations around the world, catch shares — a management system that divides up and allocates percentages, or shares, of the total allowable catch to individual fishermen or fishing groups — have generated controversy as to whether they lead to better environmental stewardship than other fishery management options. The study, funded by the Lenfest Ocean Program, concluded that these programs help to eliminate erratic swings in fishing rates, catch landings and fish population sizes, among other factors, but may not necessarily lead to larger fish populations.

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Refrigerants pose a greater global warming risk, report says

June 22nd, 2009

From Green Right Now Reports

A new study released today says refrigerant chemicals, also known as F-gases, are a more dangerous threat to global warming than had been previously predicted. The paper, published in the Proceedings of the National Academy of Sciences, projects that HFC (hydrofluorocarbon) emissions will rise rapidly in coming years and decades and may effectively cancel out some of the greenhouse gas reductions made through energy efficiency and clean energy deployment.

Scientists have projected that greenhouse gas emissions need to be capped now and that emissions need to be rapidly reduced by mid century to stabilize the atmosphere and avoid dangerous climate change. Uncontrolled HFC consumption and emissions growth would make attaining those goals more difficult.

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