Maplewood's civil servants seem to understand that small, simple acts just might change a big, warming planet. Just as summer got under way, St. Louis' neighboring little suburb to the southwest announced it was offering recyclable bags to shoppers at Maplewood businesses. The cost? Just a buck (the dark-green bags were also given away free at certain events). The city of 9,200 hopes its effort will eliminate 25,000 plastic bags from circulation this year alone. Yeah, 25,000's a pittance, and it's not going to turn the trees happy and the air clean and the gas prices lower in one fell swoop. But surely there'll be a lot fewer plastic bags drifting around on sidewalks and floating between tree branches. That's a green picture everyone can buy into.