Business Green: Venture capital investment in clean tech firms in North America, Europe, China and India unsurprisingly slumped during the first quarter of the year, falling 48 per cent year-on-year to $1bn according to new figures from analyst the Cleantech Group. The value of the average funding round also fell from a high watermark of $20m (£14m) during the third quarter of 2008 to just $12.3m during the first quarter of this year. Brian Fan, senior director of research at the Cleantech …