Business Green: US engineering giant General Electric (GE) has announced that revenue from its cleantech products will rise 21 per cent to $17bn (£10.9bn) in 2008, arguing that sales of environmental technologies could yet escape the clutches of the global credit crisis. In a market update released last week, the company said that it will invest $1.4bn in cleantech research and development in 2008 as part of its “Ecomagination” initiative. It added that to date the scheme has resulted in 70 green …