Ashton Stark stands next to his 1972 Volkswagen Beetle, which he converted into an electric car. Courtesy Noel Stark hide caption

itoggle caption Courtesy Noel Stark

A worker monitors Talmadge Creek in Marshall Township, Mich., as oil from a ruptured pipeline is vacuumed from the water. Paul Sancya/AP hide caption

itoggle caption Paul Sancya/AP

Damon Corkern, who works for ECS Solar Energy Systems, installs solar panels on a house roof in Gainesville, Fla. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images