More than 200 chemical plants nationwide will be required to reduce toxic emissions that are likely to cause cancer under a new rule issued Tuesday by the Environmental Protection Agency. The rule advances President Joe Biden’s commitment to environmental justice by delivering critical health protections for communities burdened by industrial pollution from ethylene oxide, chloroprene and other dangerous chemicals, officials said. Areas that will benefit from the new rule include majority-Black neighborhoods outside New Orleans that EPA Administrator Michael Regan visited as part of his 2021 J…