Hmm... Nice analysis about methane being one of the global warming potential gases (green house gases). In addition to buttress your point, the production of biogas doesn't require any physical burning of fuel and this make it has less impact on the cause of global warming since the gases are just produced by anaerobic decomposition of organic matter.

Thanks for your lovely comment with love from @hardaeborla and I hope you have a great day ahead 💕💗😊