But environmentalists worry that an expanded grid will help carry more dirty power.
The entertainment industry is doing more to make productions and events ecofriendly.
Speaking at the international climate talks in Poznań, Poland, on Friday, Al Gore called for a stricter upper limit on greenhouse-gas concentrations in the atmosphere.
The UN's top climate official defended a global trading scheme to reduce greenhouse gas emissions after the US government released a report questioning its efficacy.
A Web-driven challenge to his legitimacy targets members of the Electoral College.
Forget Obama’s dog. The vice president should establish his independence with a ferret or bee hive.