The environment may not come to mind when most people think about former President Bill Clinton, but on Wednesday he defended his legacy as the Environmental Protection Agency's headquarters in Washington, D.C., was renamed in his honor.
At the Hillwood Estate gardens in Washington, D.C., the new norm is: "Expect the unexpected." So says volunteer coordinator Bill Johnson, who has worked on property belonging to the heiress of the Post cereal fortune for 30 years.
Like home gardeners, the horticulturalists and professional gardeners at Hillwood are confronting an unpredictable climate.
Climate change seems like this complicated problem with a million pieces. But Henry Jacoby, an economist at MIT's business school, says there's really just one thing you need to do to solve the problem: Tax carbon emissions.
"If you let the economists write the legislation," Jacoby says, "it could be quite simple." He says he could fit the whole bill on one page.
Basically, Jacoby would tax fossil fuels in proportion to the amount of carbon they release. That would make coal, oil and natural gas more expensive. That's it; that's the whole plan.
Every year, people add 30 billion tons of carbon dioxide to the air, mostly by burning fossil fuels. That's contributing to climate change. A few scientists have been dreaming about ways to pull some of that CO2 out of the air, but face stiff skepticism and major hurdles. This is the story of one scientist who's pressing ahead.