There’s money in those maple leafs leaves, says a story today in The Globe and Mail. Toronto’s 10 million trees are worth about $7 billion Canadian ($6.4 billion U.S.), and their benefits — including reducing stormwater runoff and lowering summer cooling bills — far outweigh their costs. Here’s how to put a dollar (U.S.) on your own trees’ benefits. (Photo: Sugar maple by Paul Wray, Iowa State University, Bugwood.org.)