GE invested $55m in 12 companies in November from its $200m Ecomagination competition, including FMC-Tech.

SAM Private Equity provided the latest investment in Harvest Power and joins a consortium including New York-listed garbage disposal company Waste Management.

In January, Intel Capital, the corporate venturing unit of US-listed semiconductor company Intel, led the investment in Sulfurcell.

Alongside ETV in the $25m C round for Hara Software was Itochu Technology Ventures, the corporate venturing unit of Japan-based conglomerate Itochu and venture capital firms.

Andrew Williamson, a director at Physic Ventures, said: "WaterSmart brings meter data to life and empowers homeowners with the tools and the personalized data they need to reduce their water use without sacrificing their quality of life. They make it easy and fun to be water efficient."

Gamesa has already bought 28.7% of SkyBuilt Power and 25% in WorldWater & Solar Technologies from its corporate venturing fund.

Spanish utility Iberdrola Group's Inversiones Financieras Perseo, and manufacturer Nypro's New Ventures Group reinvested in Morgan Solar and were joined by investment manager Frost Group.

In March, Solazyme aimed to raise $100m but now said it would issue 11.5 million shares, including 1.5 million if demand is strong enough as a so-called greenshoe allotment, at between $15 and $17 each. At the top end of its pricing range, Solazyme would have an initial market capitalisation of $965m.

Alongside Cenovus' Environmental Opportunity Fund in the $19.5m series B round for General Fusion were Bezos Expeditions, the family office of Jeff Bezos, founder and head of online retailer Amazon, and venture capital firms.