(CNN) With climate change top of the agenda in most countries, more people with sharp ideas than ever before are needed to combat global warming. One Mexican company has taken that quite literally, harnessing the power of the prickly pear cactus to produce biofuel. Described as the "green gold of Mexico," the nopal plant -- already a staple in Mexican diets, medicine and cosmetics -- is pureed and mixed with manure by a clean energy company called Nopalimex. The mixture is then left to decompose, a process which produces methane.

Source: CNN March 19, 2019 10:30 UTC