Easy On, Easy Off

Strides in technology have brought some amazing products into the world that we can't seem to function without, including washing machines and ATM machines. I think programmable thermostats fall into this category too.

You can set the temperature of your heating and cooling system to turn off during the day when you're not home and kick on right before you get back. Not only does this save energy and thus, carbon dioxide emissions, but you'll notice in it your bill too.