We know, we know: It’s better to take public transit, or to walk or bike, than to drive. But for those times when driving simply can’t be avoided, remember this week’s tips about ways that you can minimize your vehicle’s impact on the planet.

Tip #2: No Need for Speed

Not only does aggressive driving aggravate others: it also wastes gas. To prevent excess pollution (and to preserve others’ positive moods), drive within the speed limit, accelerate and brake gradually, and use cruise control on highways. Driving in a too-fast, herky-jerky way can lower gas mileage by 33 percent. Plus, your zen-like lack of road rage will clear the streets of psychological pollution too.