Congressman Earl Blumenauer (D-Ore.) refutes Congresswoman Michelle Bachmann’s (R-Minn.) claims on the house floor that carbon dioxide was not harmful. “The fact is that we have the highest concentrations of carbon dioxide in the atmosphere for 2/3 of a million years. The consensus of the scientific community, not people making things up on the floor of the House, is that this has been profoundly influenced by human activity,” Blumenauer said.