Biofuels -- Rising demand for food, which competes with biofuels for arable and pasture land, and a popular backlash against the subsidies they attract, will constrain the long-term potential for biofuels production using current technology.

FORBES: Paul Maidment On Energy

In 2008, 3 350 million ha were used as permanent meadows and for pasture, more than twice the area used for arable cropping and permanent crops.

UNESCO: World Water Assessment Programme (WWAP)