The Permian/Triassic event, approximately 251 million years ago, was probably triggered by an outpouring of volcanic CO2, and caused extinction of 96% of all marine species and 70% of vertebrate species, see Permian Triassic extinction eventPermian?Triassic extinction event. There was wide spread desertification on land, and anoxia in the oceans, coupled with acidification. The global temperature increased by 6 degrees, according to some models. the last 100 years, greenhouse gas levels have nearly doubled. If we reach a tipping point, and the current global warming gets out of control, we could well see a temperature increase of 6 degrees, with catastrophic results, akin to the Permian/Triassic event. There are signs that the tipping point has been reached for the Greenland ice sheet, where ice loss has doubled in less than a decade. There is a strong positive feedback effect as polar ice is replaced by water, which absorbs more sunlight, causing further melting. ...
Do you know the Answer Please Sign-in Or register in order Answer this question?
... three single player campaigns, one for each faction. There's three difficulty settings as well. They're not the central focus of the game. They give some plot background for the universe, but mostly they function as training for multiplayer by intro... more
Check their site and see if the stores near you have any available. If not, you can always try eBay or Amazon. There is now the remake for Wii, so you can probably find it in any good game store.... more
...answer to your two questions is NO - NO. But may I explain why. The facts are during the Mesozoic Era, which commenced about 245 million years ago, the "Age of Dinosaurs" lasted for 163 mill... more
...an certainly be done. One way to do this is by placing the person (human) :-) to be measured against a relatively flat and straight wall perpendicular to the ground. Place a straight-edge on top of th... more
...ange of color occurs due to degradation of leaf by a process named Chlorosis. This happens when insufficient chlorophyll is produced by leaves, which makes them appear yellow in color. Chlorosis can a... more
...imates will support a select group of vegetation. I know that I cannot plant avocado trees at my house because it gets too hot in the summer and they prefer a cooler summer. Obviously there are plenty... more