Hell, my saw is a lot more efficient that I am. All that extra huffing and puffing will surely release more CO2 into the atmosphere than my saw produces. Plus, all the beans I'll need to get through the work day will produce copious amounts of methane in my own exhaust. Then there's the environmental impact of growing those beans, processing them, canning them, sending them by rail to the warehouse, trucking them to supermarket, putting them on the shelf (more CO2 and methane produced by the stock clerk), driving to the store to buy them, cooking them on my stove (wasting fuel, and creating even more CO2, CO, unburned HCs, PAHs, etc.), then running the dishwasher to clean up after. Considering all of the above, I think it's rather obvious that the EPA should stay clear of the whole chainsaw issue if they really want to help the environment.