Scientists fear mass extinction as oceans choke

Low oxygen levels, which have been found along south-easternAustralia, are known to increase stress on fish.Photo Credit: Reuters/Ho New By: Amy SimmonsABC News (Australia), December 1, 2010 Australian scientists fear the planet is on the brink of another mass extinction as ocean dead zones continue to grow in size and number. More than 400 ocean … Continue reading Scientists fear mass extinction as oceans choke