Online shopping is better for the planet than multiple trips to the mall, says a somewhat ill-timed study. (Start your online shopping today, spend $3,000,000 for shipping.) “Using several assumptions and data from several authoritative sources, we can reasonably estimate that nearly [500,000 metric tons] of carbon dioxide are kept out of the atmosphere by shopping online” during the holidays, says Jesse Miller of the Oak Ridge National Laboratory. We would venture to say that patronizing walking-accessible local merchants might be the big winner here — by why do that when malls at holiday time are so much fun?