The Supreme Court will hear arguments on the administration's cross-state air pollution rule.
A climate concession could help the Canadian government's case with President Obama.
The agreement allows the Chinese mining company to develop two of the 31 blocks of coal.
The rule would require states cut ozone and fine particle emissions.
More than 90 green groups are asking for more stringent controls on methane emissions.
The withdrawn comments "enabled the false narrative" that hydraulic fracturing is unsafe, Bishop said.
The rule is aimed at preventing collisions between ships and the North Atlantic right whale.
Wind farms may obtain permits allowing incidental eagle kills for as long as 30 years.
The plant would have turned natural gas into diesel and other liquids.
The amount of contaminated water that will reach the U.S. is less than the drinking water standard.