Typical N. Dakota natural gas flare.
Joshua Doubek, Wikimedia Commons
But what is flaring and why is it an issue? Flaring is the practice of burning off natural gas to dispose of it, primarily this happens right after a well is put into production or when other methods of using the gas are more expensive to implement than its market value. Operators do not want methane (the primary hydrocarbon in natural gas) accumulating on their wellpads where it can explode, and burning it off is slightly less harmful to the climate than venting it directly to the atmosphere.