Business Green: US venture capital investments in clean tech companies fell by 55 per cent in the third quarter of 2010 compared to the same time last year, although analysts were quick to play down the implications of the apparent loss of confidence. A report released earlier this week by consultancy Ernst & Young and based on data from Dow Jones VentureSource, found the number of venture capital clean tech deals fell by almost a quarter with only $575.6m (£353.3m) invested across 53 financing rounds, less…