Photo by Dave Lawrence.

Cross-posted from Climate Progress.

A new document has surfaced [PDF] showing Mitt Romney’s strong support for regulating carbon dioxide in 2003, when he called cap-and-trade “an effective approach” to combating climate change.

The comments were made in a letter from Romney to New York Gov. George Pataki (R) about a regional cooperative system for regulating greenhouse gases. In the letter, Romney agreed with Pataki on the need to “reduce the power plant pollution that is harming our climate.”