President Trump's efforts to upend the trade treaty known as NAFTA could jeopardize the U.S.-Mexico trade in natural gas -- on which the U.S. energy industry depends.

"A U.S. watchdog group filed a lawsuit in a federal court on Tuesday to force the Environmental Protection Agency to release communications with billionaire investor Carl Icahn, who it says tried to influence biofuels policy for personal gain."

"U.S. authorities are investigating a cyber intrusion affecting multiple nuclear power generation sites this year, E&E News has learned. There is no evidence that the nuclear energy industry's highly regulated safety systems were compromised. But any cybersecurity breach — targeted or not — at closely guarded U.S. nuclear reactors marks an escalation of hackers' probes into U.S. critical infrastructure."

"The Trump administration's top environmental official met privately with the chief executive of Dow Chemical shortly before reversing his agency's push to ban a widely used pesticide after health studies showed it can harm children's brains, according to records obtained by The Associated Press."

"The Trump administration on Tuesday took a major legal step toward repealing a bitterly contested Obama-era regulation designed to limit pollution in about 60 percent of the nation’s bodies of water."

"As the nation's mayors closed their annual meeting on Monday in Miami Beach, they sent a clear signal that cities are looking for action on climate change and are eager to fill a policy gap created by the Trump administration."

"The lobbying fight over a House bill to revitalize coal country has heated up ahead of a key committee hearing on Tuesday."

"The Supreme Court [Monday] declined to add two environmental cases to its docket for the fall term."

"U.S. EPA is putting the word out that the agency is in the market for science advisers."