Business Green: Venture capital investment in the world’s largest clean tech markets almost doubled during the first three quarters of the year, according to the latest research from Ernst & Young and DowJones Venture Source. The study found that venture capital investment in clean tech firms in the US, Europe, China and Israel during the first three quarters climbed 82 per cent year on year to a record $4.6bn (£3bn). Gil Forer, Ernst & Young’s global director of clean tech, IPO and …