The least - cost solar option would require 400 times more land area and emit 20 times more CO2 than nuclear power. (co2insanity.com)
With even a small rise in temp, there would be more rainfall and deserts would shrink providing more land area for plant growth. (climate-skeptic.com)
Biofuels use more land area, generate more greenhouse gas emissions, and have a greater impact on the environment than other alternative energy sources such as photovoltaic solar energy, solar thermal energy, or wind power. (sciencemag.org)