Despite the fact that Catherine and I have been arguing about the merits of my push lawn-mower-- she claims my beloved push-mower doesn't really cut the lawn-- this morning when I read in Wired that a gasoline-powered mower emits eleven times more pollution than an automobile-- get this-- I didn't even mention it to her . . . I made a very mature executive decision not to open that can of worms on a peaceful Saturday morning while we were drinking our coffee (but I can't promise that I won't mention the fact at a later date).