Eat at least one vegetarian meal each week.

Eat at least one vegetarian meal each week. According to RealSimple.com, eliminating just 4 oz. of beef from your diet each week will save 3,000 gallons of water per year – it takes loads of water to grow the grain to feed cattle. They say it can also have the same impact as driving a hybrid car, due to the reduction in greenhouse gases produced by livestock!