WRI和Standard＆Poor的研究检查了13个最温室气体密集型化学品制造子行业的政策情况可能对信用的影响。

WRI和标准普尔的分析涵盖了由政府北美行业分类系统（NAICS）定义的13个化学药品行业。These subsectors make up less than half ($332 billion) of the $724 billion U.S. chemicals industry’s value of shipments in 2007, but contributed to more than 90% of the chemicals industry’s overall direct GHG emissions in 2006. Standard & Poor’s and WRI chose these subsectors because they exhibited relatively high GHG intensity per unit of product compared with that of the entire chemicals industry and, thus, are most vulnerable to policies aiming to reduce GHGs.