Government estimates of methane emissions from the Rocky Mountain region might be low.
Methane is a potent greenhouse gas that’s produced by agriculture, natural gas drilling and coal mining, among other things. Knowing how much of it is being released is important because of its potential effects on climate.
The Sierra Club and Wild Earth Guardians are suing the federal government over planned coal leases in the Powder River Basin.
The BLM has approved the sale of four new coal leases in the area, which could produce up to two billion tons of coal. The Sierra Club’s Connie Wilbert says her group worries about the greenhouse gas emissions that could result from the additional mining and subsequent use of the coal.