这项研究考察了我们的原材料使用的影响、汽车尾气对公共健康的影响（特别是在拥堵的城市地区）以及对总体温室气体排放的影响 — — 全世界有23%的温室气体来自汽车业。
The study examined the effect of our raw-material usage; the impact of car exhaust on public health, especially in congested urban areas; and the contribution to overall greenhouse-gas emissions – 23% of which come from the auto industry worldwide.