As silly as it sounds, this is a really important step in regulating greenhouse gasses.
If we could somehow work out a volcano tax, that would just be golden.
I agree. Attempting to tax something in the name of saving the planet is as effective as constantly raising taxes on cigarettes to cut health care costs. Instead of wasting our time and money in trying to collect taxes on free-floating gas in a way to decrease our desire to have beef, why not try to develop a process to collect the gas and use it as a source of fuel. That would have a greater impact on helping the environment than taxes.