The Gates Of Hell

Burning gas crater in Turkmenistan has been polluting for 41 years.

http://www.treehugger.com/clean-technology/geologists-accidentally-opened-the-door-to-hell.html

Photo credit: johnhbradley.com via Treehugger
/ sulphur dioxide SO2 carbon dioxide CO2 greenhouse gas energy waste global warming climate change pollution asthma /