Al Gore has posted a note entitled “confronting disappointment” in which he takes President Obama to task for “[bowing] to pressure from polluters” in ordering the Environmental Protection Agency not to seek a tightening of air-quality standards.

The EPA’s proposal had been under fire from Republicans and business groups who cast it as job-killing regulatory overreach. The new rules, which would have strengthened air quality standards beyond where they stand in many states, could have forced reductions in oil and gas projects, the Wall Street Journal reports.