Make a big difference--one small step at a time. For anyone concerned about global warming and other environmental issues, this is the calendar that cares as much as you do. Living Green returns with another year of smart, simple ways to reduce waste, minimize energy use, and otherwise tread more softly on the earth. In the market for a new computer? Consider that laptops are much more energy-efficient than desktops. Rather than bagging or burning autumn leaves, mulch them into compost-rich lawn food. Keep those tires filled! Underinflated car tires increase resistance and take a toll on gas mileage.