Marketplace: Kai Ryssdal: One quick footnote to that booming business on K Street. Apparently green is in. There’s a report out today from the Center for Public Integrity that says the number of green lobbyists has tripled in the last five years. There are nearly 2,500 people now employed trying to get their clients views heard on climate policy. Wall Street in particular sank a lot money into green. Tax breaks meant they could write off every dollar they put into wind or solar farms. But as their …