Kate Sheppard, author of, "Why My Dad's Going Green," responds to the winning essays of the Fall 2011 writing competition.

Kumi Naidoo is building a global movement to force world leaders to adopt a binding agreement on climate change. He is executive director of Greenpeace International and chairs TckTckTck, a global campaign for climate action.

Left homeless after Hurricane Katrina, she fights for communities that will suffer most from climate impacts.

A former Obama campaigner helps neighbors find talented green workers to make their homes climate-friendly.

My Republican dad saw the light. And it was green.