A gas flare is seen at a natural gas processing facility near Williston, N.D. in 2015. A new study says the amount of methane leaking is more than government estimates.

A gas flare is seen at a natural gas processing facility near Williston, N.D. in 2015. A new study says the amount of methane leaking is more than government estimates.

A gas flare is seen at a natural gas processing facility near Williston, N.D. in 2015. A new study says the amount of methane leaking is more than government estimates.

A gas flare is seen at a natural gas processing facility near Williston, N.D. in 2015. A new study says the amount of methane leaking is more than government estimates.