Business Green: Venture capital investment in European cleantech firms could reach record levels this quarter, according to research firm Library House, which today released its annual list of the top 100 cleantech firms in Europe. The company said that a number of big deals, including €85m (£67m) of fresh backing for German solar giant Sulfurcell Solartechnik, meant that this quarter could break the previous record of €260m achieved in the fourth quarter of 2007. Richard White, …