The world’s need for energy is increasing while a promising potential energy source is being flushed down our toilets every day. So, what is the biggest benefit of using this wastewater—as well as other organic waste from our gardens and kitchens— to heat homes, provide electricity, and even power cars? Emissions reduction.

Methane makes up 16 percent of global greenhouse gas emissions, and it’s extremely potent—about 30 times more powerful a greenhouse gas than carbon dioxide. Sludge-to-energy systems harness this methane for energy instead of letting it escape into the atmosphere, where it would fuel climate change.

Read about more benefits here.

Photo credit: CAFNR via / CC BY-NC