Zerofootprint founder and TreeHugger contributor Ron Dembo and Toronto Mayor David Miller launched a new footprint simulator in New York at the C40 Large Cities conference . The New York Times calls it a carbon calculator but it is much more. In the Times Ron says “This is serious software, serious quantitative methods and social networking technology brought to the green world.” The Zerofootprint simulator doesn’t just measure carbon, but our impacts in trees, waste and water as well as carbon.