// Stop The Warming!

This video tells of a mass extenction 250 million years ago, in the Permian period. Go through the quiz to find out what happened: http://www.pbs.org/wgbh/nova/sciencenow/3318/01-susp-flash.html

The quiz shows diffrent ways of mass extinction:

• Asteroid or Comet Impact
• Volcanism (volcanoes in Siberia in a wide expance the size of the U.S. referred to as the Siberian Trap)
• Formation of Supercontinent (Pangea)
• Glaciation (forming of glaciers)
• Anoxic Oceans and Bacteria (oceans without oxygen that have bacteria that give off the toxic greenhouse gas, hydrogen sulfide)
• Methane Gas (100 billion tons of methane trapped in ice at the bottom of the ocean – was around since the Permian period and still is – and released by global warming)

The answer was a combination of these: the Siberian Trap [which led to] global warming [which led to] an oxygen devoid ocean [which led to] all the ocean’s critters dieing and bacteria in the ocean churning out hydrogen sulfide – a toxic greenhouse gas [which led to] mass extinction on land also. All I can say is that it must have stunk (in a more literal sence, too). If you don’t like my explanation, go to the main episode page to watch the video: http://www.pbs.org/wgbh/nova/sciencenow/3318/01.html Believe me; it is a really good video.

global warming happend before because of volcanoes. more later…

This is the first post and I would like to say thanks to some awesome people out there who are as passionate as I am about the environment.