| http://www.w3.org/ns/prov#value | - The Company has raised $140 million to date and is backed by leading investors including Suncor Energy, the Dow Chemical Company, AES Corp., and Peabody Energy, as well as major financial institutions and venture capital firms, including Kleiner Perkins Caufield & Byers, Khosla Ventures, Draper Fisher Jurvetson, Advanced Technology Ventures, and Citi's Sustainable Development Investments.
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