ROBERT F. DODGE, M.D. – On April 22, we marked the 49th anniversary of the first Earth Day. This comes 50 years after the Santa Barbara oil spills which were instrumental in the declaration of the first Earth Day. The fate of our planet remains threatened by two inextricably connected threats, that of climate change and nuclear war. We cannot pretend to be concerned about our environment if we are not simultaneously concerned about the destruction of the planet by nuclear war.