Among the signatories of the warning was Bob Johnson, the originator of the "ecological footprint" concept, which measures the total amount of environmental input needed to maintain a given lifestyle.
2
一般来说,牛羊肉每克蛋白质所产生的生态足迹最大。
In general, beef and lamb have the biggest climate footprint per gram of protein.
3
研究表明,吃肉较多的人可以通过转向纯素饮食将食物相关的生态足迹减少三分之一或更多。
Studies have shown that people who eat a meat-heavy diet can reduce their food-related footprint by one third or more by moving to a vegan diet.