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10. Street Trees on Couch

2013-02-25 23:18:51| PortlandOnline

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About Heritage Trees

2013-02-15 21:55:03| PortlandOnline

Learn about the process for designating a Heritage Tree

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Visit Portlands Heritage Trees

2013-02-15 21:08:26| PortlandOnline

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Study Says Wetland Trees Significant Source Of Greenhouse Gas Methane

2013-02-14 22:04:00| Climate Ark Climate Change & Global Warming Newsfeed

RedOrbit: While wetlands represent an enormous source of atmospheric methane, researchers taking measurements of the gas at ground level in these regions have noticed a significant drop in methane levels compared to what they have measured in the air around tropical areas. The team of scientists studied both swamps and flooded forests in the tropics. After taking ground-based measurements of methane, they found that levels of the simple organic gas have fallen short of the quantities detected in tropical...

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Trees by Species

2013-02-13 23:42:41| PortlandOnline

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