We're conserving energy in seven government buildings by raising thermostats four degrees. Join us! Register your business in our Cool Biz program and help us measure energy savings. Learn more...

Help the Town of Windsor restore a treasured community park devastated by a tornado in May. By making a donation to The Mile High Million's new TreeBank, you can help restore Windsor Main Park for future generations. Donations received between now and July 10 will go directly toward the purchase and replanting of trees in the Windsor park system. Learn more | Donate online today!

Insulating and sealing your home helps reduce heating and cooling needs, which saves energy and money. But many of Denver's older homes lack proper insulation. If you're a homeowner of an existing home that needs retrofitting, rebates are now available to help with your installation costs. Learn more...

Coloradans can now drop off used compact fluorescent light bulbs (CFLs) and mercury-containing thermostats for free recycling at any Ace Hardware store in the state. The spiral shaped bulbs contain a small amount of mercury and should not be thrown away in the trash. CFLs are also accepted in Denver's Household Hazardous Waste collection program.

Change five simple habits today and make a positive impact! Pledge to do your part and help Denver become the most environmentally friendly city in the nation. We'll send you a free residential toolkit with resources and tips to help green your home. Make the pledge!

Spring has arrived! We're digging in the dirt and counting trees again this year. The Mile High Million's 2008 spring planting season begins on April 17 and runs through mid-May. Events will take place throughout the metro area. Some events still need volunteers! Find an event near you | Register your tree