Replacing just one incandescent bulb with a compact fluorescent lightbulb (CFL) will make a big difference, especially if everyone did that.  It would reduce carbon emissions equivalent to taking 1.3 million cars off the road, or not burning 29,900 railcars of coal.¹  The impact on the environment is unbelievable.  You can't make a better economic investment for your home.  Replacing one bulb is estimated to save you $66 over the lifetime of the CFL.  I replaced three bulbs with CFLs last year.²  I'll replace another six this month.  I hope you join me.

1. See Fast Company How Many Lightbulbs Does It Take to Change the World? One. And You're Looking at It [back]
2. Will Wal-Mart Change the World Selling CFLs? Let’s Wonder… [back]