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Monday, October 13, 2014

ScienceDaily: Top Environment News

ScienceDaily: Top Environment News

Efficacy of 'natural' bed bug pesticides compared

Posted: 12 Oct 2014 10:48 AM PDT

The efficacy of nine essential oil-based products and two detergents that are labeled and marketed for bed bug control were evaluated by researchers. When the researchers sprayed the 11 non-synthetic pesticides directly on bed bug nymphs, they found that only two -- EcoRaider (1% geraniol, 1% cedar extract, and 2% sodium lauryl sulfate) and Bed Bug Patrol (0.003% clove oil, 1% peppermint oil, and 1.3% sodium lauryl sulfate) -- killed more than 90 percent of them.

Icebergs once drifted to Florida, new climate model suggests

Posted: 12 Oct 2014 10:48 AM PDT

Using a first-of-its-kind, high-resolution numerical model to describe ocean circulation during the last ice age about 21,000 year ago, oceanographers have shown that icebergs and meltwater from the North American ice sheet would have regularly reached South Carolina and even southern Florida. The models are supported by the discovery of iceberg scour marks on the sea floor along the entire continental shelf.

How beavers have affected ecosystem at Voyageurs National Park

Posted: 09 Oct 2014 06:03 PM PDT

Felling trees, building dams and creating ponds -— beavers have a unique ability to alter the landscape in ways that are beneficial to other organisms, according to one expert who is researching how beavers have affected the ecosystem at Voyageurs National Park near International Falls, Minnesota.

Launch of new sensor device on Hudson River set to 'wire' river for cleaner water

Posted: 09 Oct 2014 01:33 PM PDT

In the race to find solutions to critical water issues, the launch of a new cost-effective water quality sensor device is the first step in overcoming hurdles of historically prohibitive costs for long-term water resource monitoring, scientists say.

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