Colorado says it's cut methane leaks as Trump eases US rules

The Trump administration is rolling back some U.S. regulations on climate-changing methane pollution, calling them expensive and burdensome, but Colorado says its rules are working — and they have industry support. Energy companies have found and repaired about 73,000 methane leaks since 2015 under a state-required oil field inspection program, according to the Colorado Air Pollution Control Division. The number of leaks fell by 52 percent, from more than 36,000 in 2015 to about 17,250 in 2017, according a state report released last week.