Eliminating consumption of meat and dairy is the single biggest way to reduce your environmental impact on Earth, a new study has found. Scientists from Oxford University and the Swiss agricultural research institute, Agroscope examined 40,000 farms and 1,600 processors, packaging types, and retailers in 119 countries. The study marks the most comprehensive analysis yet of damage farming does to the planet. It also assessed how different production practices and geographies lead to different environmental impacts for 40 major foods. They found that without meat and dairy consumption, global agricultural land would be reduced by 76 percent.