Never thought I’d be quoting Arnold Schwarzenegger on any topic, far less global warming, but I think he more than any other politician deserves credit for nailing the most troubling aspect of anthropogenic climate change–that it’s a "self-inflicted wound."
But as climate scientist Brenda Ekwurzel points out in a letter to USA Today, that has an upside:
Global warming is a human problem, but that means we humans can all do something about it.
The place to start? The USA, which emits about 30% of CO2 worldwide.