Did You Know Some Natural Gas Wells are 90% CO2? The IPCC and AGW try and tell us natural sources of CO2 (such as from volcanoes) are so small.
How hard do you think they are trying to detect large underground/undersea CO2 sources? Not very hard.
9 million cubic feet a day flow from that well, and 90% was CO2.
sunshine hours 
Reblogged this on CraigM350.
Yes, but these wells would not generally be economic. Besides the CO2 not being saleable, you need speciall metallurgy in CO2 wells. By CO2, I mean anything over 0.5%. Chrome casing, tubing and tools need to be used.
There are also wells with very H2S content, but these are basically sulphur mines.
Some wells in the US have a high helium content, and is the main source of helium.