Livestock is a major contributor to climate change, accounting for 18 percent of the greenhouse gas released every year. In addition, livestock accounts for eight percent of global water use, and as much as 70 percent of deforestation is driven by the need for more pastures and feed crops. Dietary changes can dramatically decrease humanity' s environmental footprint, such as adopting a vegan or vegetarian lifestyle. Which one of the following most accurately represents the author's conclusion? ['The Earth will be destroyed unless everyone stops eating meat.', 'People can reduce their environmental impact by adopting dietary changes.', "Dietary changes are the only way to decrease humanity's environmental footprint.", 'Deforestation contributes to climate change.']