Ann Arbor, Michigan [RenewableEnergyAccess.com] Cleantech venture capital investing in North America realized its 8th consecutive quarter of growth with a record $843 million invested in cleantech in Q2 2006, Cleantech Venture Network researchers reported recently. The energy segment led the way with $594 million, a 69% increase over the $352 million invested in Q1 2006.According to data, the $843 million in venture capital invested in cleantech during Q2 2006 represented a 64% increase over the $514 million invested in Q1 2006 and a 129% increase over Q2 2005. Cleantech investment reached 13.4% of all venture capital invested in all categories for the quarter. In the first half 2006, energy investment tripled to $946 million, from same time last year. Year-to-date cleantech investments totaled $1.4 billion, nearly doubling the $704 million invested in the first half of 2005. For all of 2005, cleantech investing totaled $1.6 billion. Also significant was that six of the ten cleantech segments showed increases through the first half of 2006, indicating broad investment interest in the category. In Q2 2006, cleantech surged ahead of the two previously dominant venture investment categories of Telecommunications and Medical. It now ranks third behind only Biotech and Software, indicating its shift into the mainstream, observed Keith Raab, CEO and Co-Founder of the Cleantech Venture Network. A complete detailed analysis of both North American and European data will be presented at the Cleantech Venture Forum September 20-22 at the Marriott Marquis in New York City. The Cleantech Venture Monitor, the primary source for quarterly cleantech deal information, has tracked more than $10.2 billion in cleantech deals since 1999.