[wenyuanyu]

Natural gas and biogas, are they both CH4? I heard they could be way worse than CO2 and leak might be inevitable to distribute them around the country and pumped into cars from time to time? Are there scientific evaluation on the impact?

[Ndymium]

It's the same stuff. I'm not sure how much of it leaks, but you have to either flare it or use it for something or it leaks anyway. Using it for cars and trucks is basically flaring it but using that energy for propulsion.

The taxes are not based on that, though. They're strictly interested in tailpipe emissions (not even lifecycle emissions), and don't recognise biogas at all.

I'm planning on switching to a BEV eventually, but right now it's not financially possible. Most of the time I commute on my bicycle anyway.