Reuters: The average American family would pay at most $1 a day more to fight climate change, the head of the U.S. Environmental Protection Agency told a Senate committee on Tuesday. EPA head Lisa Jackson said carbon-cutting legislation would, on average, amount to a 50-cent per day cost per household in 2020 and edge up for wealthier families, people who drive long distances and those living in states dependent on coal for electricity. But even a doubling of the national average would …