Every first lady has her special cause that she works to help. Nancy Reagan had the war on drugs, Laura Bush championed literacy, and Michelle Obama cares about childhood obesity. But many of the firsts were also concerned about the environment. Here is a look at five American first ladies — Helen Taft, Lou Hoover, Eleanor Roosevelt, Lady Bird Johnson and Pat Nixon — who brought a little green to their official roles as White House hostesses!
5 eco-friendly first ladies
