As regulation of greenhouse gases nears, EPA releases guidelines

The guidelines are intended to help states and industry evaluate the cost and kind of technologies that would best reduce greenhouse gases.

The Environmental Protection Agency on Wednesday unveiled new regulatory guidance intended to help states' air-pollution regulators and heavy industry evaluate the cost and kind of technologies that would best reduce greenhouse-gas emissions.

It comes in the run-up to the historic first regulation of greenhouse gases (GHGs) from US industrial sources on Jan. 2. On that date, the EPA will require large new projects or plant upgrades that emit more than 75,000 tons of greenhouse gases to have a permit.

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