Excessive amounts past what is needed for local heat and electricity. North Dakota did recently pass legislation requiring more efficient/environmentally friendly storage/processing/usage of natural gas that would've previously been flared, regardless of how economically viable it is.
EDIT: I'm mistaken. North Dakota gave the industry an extra 10 months to meet these requirements.
http://www.reuters.com/article/2015/09/24/us-north-dakota-fl...
> Governor Jack Dalrymple and the two other members of the North Dakota Industrial Commission (NDIC) voted unanimously to change the date when companies must capture 85 percent of natural gas produced from their wells to Nov. 1, 2016.
Classy North Dakota.