If Michael Mann never charges for his talks, how does he explain this Jodi F. Solomon Speakers Bureau web page, which touts him as a "public fighter at the center of the debate over climate change"?

Dr. Michael Mann

"If you don't believe our climate is changing, read this book. Dr. Mann will change your mind. For us, it's a war of words. Preserve the Earth, and pass the ammunition."
- Bill Nye, The Science Guy (on "The Hockey Stick and the Climate Wars")