Military leads the way in breaking our oil addiction

By U.S. Rep. Gabrielle Giffords

The safety and security of the United States will depend on how well we as a nation address the challenges of climate change.

That was reaffirmed for me at the recent United Nations climate conference in Copenhagen, which I attended as part of a bipartisan congressional delegation.

Opponents of climate action argue there is no proof that greenhouse-gas emissions are causing climate change and therefore we should not expend significant effort to reduce those emissions.

But many of the steps that would reduce greenhouse-gas emissions are steps we must take to increase our national security