The latest government stats show that planet-warming emissions have fallen in 5 of the last 7 years.
Virgin planes produced more greenhouse gas emissions per passenger than other domestic US carriers in 2010, report finds.
A combination of burning trees for energy and capturing and storing carbon dioxide could offset and even reverse emissions.
Want to sell a Republican a greener light bulb? Don’t tell them it’s green.
Investments in solar and green power are on track to blow away fossil fuels by 2030.