Using public transportation (bus or subway) or walking and biking are two of the items listed in the magazine because transportation accounts for 30% of all carbon dioxide emission. Unfortunately, it is not always practical especially if you do not live in an urban city.
Other ways to reduce carbon dioxide emission include paying your bills online and signing up for e-notification, using energy saving compact fluorescent lightbulbs (CFL), washing the laundry in warm water instead of hot and washing one big load instead of multiple small loads, opening the window instead of switching on the air-conditioner, and eating less meat products.
So what are you doing to protect Mother Earth for our future generations?