HEATKEYS

Protecting Nature, Preserving Life

The University of California, Berkeley has developed this free, user-friendly calculator to help you estimate your carbon footprint and compare it to households of similar size and income. Get a personalized report for your household or small busines...

Fight global warming by reducing your carbon footprint today - TerraPass helps individuals easily and affordably balance their environmental impact

MNN is the leading resource for daily environmental news, green commentary and simple steps to save money, stay healthy, and support the planet.

Ever wondered how much ?nature? your lifestyle requires? You?re about to find out. The Ecological Footprint Quiz estimates the amount of land and ocean area required to sustain your consumption patterns and absorb your wastes on an annual...

A nonprofit organization dedicated solely to finding and promoting solutions to global warming.

The Bon App?tit Management Company Low Carbon Diet Calculator is designed to allow you to compare the relative carbon impacts of your food choices.

The GREENS: a kid-friendly site about looking after the planet.

We have created a tool that film and television producers can use to calculate their production's carbon footprint. Using the Green Production Guide calculator, producers will be able to quickly see where their green practices effect their f...