Nature World: In the fight against climate change, most experts focus on controlling emissions of carbon dioxide, but methane is actually the more potent greenhouse gas, even more effective at trapping heat in Earth's atmosphere. Now, thanks to a new device, scientists are sniffing out the origins of harmful methane, helping them to better understand its role in warming the planet.
Methane gas comes from a variety of places, both natural and man-made. They range from lakes and swamps, natural-gas pipelines...