MIDLAND, MI - Dow Chemical Co. is joining forces with two other groups to help keep plastic waste out of the environment, including the world's oceans. The Midland-based chemical giant announced it will become a founding investor in Circulate Capital's $100 million effort to incubate and finance companies and infrastructure that prevent waste in the oceans. A spokesperson for the Dow declined to comment on how much it has pledged, but did say it is one of the companies placing an initial investment in the organization. Other companies include PepsiCo Inc. and The Coca-Cola Co. According to Circulate Capital's website, it is an investment management firm financing innovation, companies and infrastructure that prevent the flow of plastic waste into the world's oceans. At a recent conference in Bali, Indonesia, Dow also announced it will donate $1 million to Ocean Conservancy over the next two years to support waste collection and recycling in Southeast Asian countries.