Flames from a flaring pit near a well in the Bakken Oilfield on the US/Canada border. The primary component of natural gas is methane, which is odourless when it appears from a well. Credit: Orjan ...

A mechanical dog unleashed at a California landfill can scamper over mountains of trash in hot pursuit of methane leaks. The four-legged robot is part of a pilot project that Orange County Waste ...