I don't know much about insurance, nor would I recommend any particular company, but Esurance is supporting Earth Hour, a world-wide energy conservation program that takes place on March 28th. In the program people are asked to dim and turn off unnecessary lights for just one hour.
The net result is less energy used, less greenhouse gasses produced and darker skies. In many places people are even encouraged to go outside to see the stars during the event - a cool thing to do, especially during the International Year of Astronomy.
Check out the Esurance commercial about Earth Hour: