Here's today's challenge:
This is a hard one: Keep your highway driving speed between 55 and 60 mph today. For most vehicles, 55 mph is the most fuel efficient highway speed and will save you up to 20-30% in fuel costs compared to driving at 75 mph. Automobile emissions are one of the leading causes of greenhouse gases. Don't idle your car at traffic lights and drive-up windows. If you have to stop for more than 10 seconds, you will save gas and reduce greenhouse emissions by turning off your engine.
Until tomorrow ...
WE'RE CHANGING THE WORLD ... ONE CHALLENGE AT A TIME!