Gavin Schmidt is a climate scientist at the NASA Goddard Institute for Space Studies as well as the co-founder of RealClimate.org, where he is a contributing editor. For more info go to RealClimate.org or NASA GISS.
Joshua Wolfe is a photographer who splits his time between NYC and DC. He is the founder and president of GHG Photos, an agency representing photographers that specialize in climate change. His photography is represented by the Henry Gregg Gallery. For more info go to GHG Photos or his personal website.