We began tracking venture capital investment in Greentech in 2004 when the sector really didn't have a name and represented only 1 percent of VC investment totals.

Companies like Nanosolar and Miasolé were just getting started and most VC investors were simply trying to get their heads around this relatively underinvested trillion dollar market.

A few years later, Greentech VC investment represents about 20 percent of the VC asset class – 2008 finished with a total VC investment of more than $7.7 billion in more than 350 funding rounds, roughly one investment a day, with time off for Christmas and New Years.

Greentech Media just released the most recent quarterly data showing that venture capital investment in green technologies exceeded $2.5 billion in the fourth quarter of 2008, a modest decrease from the previous quarter's total of $2.9 billion.

Get the rest of the story at Green Light.