Marchers carried tiny wind model turbines to the White House on Saturday, along with banners supporting solar energy, carbon taxes and pipeline resistance.
By David Siders
Gov. Jerry Brown on Tuesday said a tax on carbon dioxide emissions has potential and suggested he was open to the idea.
The Democratic governor, a fiscal moderate but longtime champion of environmental causes, noted support among some conservatives for a revenue-neutral carbon tax, in which proceeds are not held by the government.