Studies show that being able to see your energy usage makes it easier to reduce it. Google wants people to be able to do so throughout the day, but this sort of near real-time feedback requires an advanced electricity meter known as a smart meter. Over 40 million U.S. homes will get these upgraded meters over the next 3 years.

The Greenathon will help raise funds for TERI's Lighting a Billion Lives campaign that aims at solar powering villages across the country.

Znout stands for 'zero negative output. Znout is a CO2 neutral Internet search engine that turns your web searches into green web searches.

Eco House, residential villa, Benahavis, Spain, 2009. It is a 7,000 square feet villa with a zero carbon footprint and almost zero operating costs. This project will be built in Southern Spain by 2009, with 75% less waste and will operate 80% more efficiently than a similar sized home.

Unit of measurement for hotels and venues stating the carbon emission per available room per day, or function room per half day. Name given to the process of indexation of hotel and venue carbon data and its distribution.

Eco Assist combines multiple functions: the ECON mode that optimizes control of the variable transmission, engine and powertrain components to conserve fuel and a feedback function that uses speedometer background color to provide real-time guidance on environmentally responsible driving.