这是目前分词作什么状语

The reason for the change is that now there are dozens of companies across the country buying discarded plastic soda bottles, and turning them into fence posts, paint brushes, etc.中buying and turning 是随着状语吗，可是buying and turning 的逻辑主语不是句子主语而是句子宾语companies吧，所以这是什么状语呢，想不通

there be存在句的真的主语为companies，目前分词短语作定语，不是状语。目前分词作定语，被修饰名词就是目前分词的逻辑主语。