These renewable energy sources usually produce less greenhouse gas emissions than other fuels. (greenfacts.org)
With thirteen times less greenhouse gas emission than beef, tofu is a protein - packed food that requires less water than many sources of animal protein. (mindbodygreen.com)
It drives like a regular gasoline - powered car but produces 20 to 30 percent less greenhouse gas emissions than a gasoline or diesel car. (scientificamerican.com)