I recognized Paul Hawken’s name from a long time ago. It was the late 1960s. I was living in the East Village and I was eating a macrobiotic diet: grains, vegetables, miso, tamari, aduki beans. I often went to the health food store and bought Erewhon products. Hawken is the man who started the Erewhon Trading company. He also co-founded the garden supply company Smith and Hawken, businesses with an emphasis on operating in a socially responsible way. Hawken also hosted a PBS series called Growing a Business. And through it all he has thought a lot about our environment, the climate and how people relate to one another. He’s also written many books. His latest is called Carbon: The Book of Life. We talk about natural foods, being an entrepreneur and the future of the planet on the new episode of “Now What?”