In the last decade Americans have eaten 19% less beef then over past decades. Although they are more concerned with health, it has also had an unintended positive effect on the environment. According to research done by The National Resources Defense Council 37% of Americans cited health as well as the cost of beef as the main reasons for the increase in consumption of other proteins such as chicken and tofu. The effects of raising cattle creates greenhouse emissions. This reduction is equivalent to the emissions of about 39 million cars. Cattle feed is grown using petroleum based fertilizers. In turn the animal’s digestive system produces methane gas. Methane is 25% more damaging to the environment then carbon dioxide.