Greening Your Small Business is a new book out this month by Jennifer Kaplan, a partner in Greenhance, a Washington, D.C.-based consulting firm working with large and small businesses to gain better insight into their impact on the environment. She also teaches at Marymount University's business school in Arlington, Va. Courtesy Jennifer KaplanI talked to Kaplan about her new book and why she wrote it. Below are highlights from our discussion. Q. Why did you see a need for this book? Kaplan: I was teaching market research at Marymount, and one student was working with a business who needed help …