If things look a little greener around here this April, there's a good reason. Our editorial staff is busy expanding the ideals of Earth Day into a month-long celebration of energy conservation, alternative transportation, recycling tips and about a million ways you can be a better friend to the planet. Welcome to Green Month, Milwaukee.

In the spirit of OnMilwaukee.com's Green Month, we're happy to tell you about Walgreens' one-day-only ink cartridge refill day. Today, Wednesday, April 2, over 3,000 Walgreens locations nationwide offer a free printer cartridge refill for the following printer brands: Dell, HP, Lexmark, Okidata, Primera, Sharp and Xerox.

All you need is a coupon you can get here and an empty ink cartridge. Don't buy a new one, refill your old one!