You can compare how that building, in terms of its emission in tons of carbon dioxide per year -- at the time that we took that project, over 7,000 tons -- what it would have been with natural gas and finally, with the vegetable oil, 450 tons.
你可以比较这栋建筑 每年的二氧化碳排量-- 在项目开始时是7000吨以上。 使用天然气后呢？ 最后使用植物油只有450吨。