Biogas released from decomposing organic matter is about 60% methane, making it a valuable renewable source of natural gas. But carbon dioxide, which makes up the other 40%, must be removed before the ...

While biogas — energy produced mostly from crops or animal manure — has long been promoted as part of the European Union’s ...

Nearly half of Rwandans live in poverty, relying on small-scale farming for survival and without gas or electricity. With so many people spending hours foraging for wood for cooking and light, often ...