Kleiner, Perkins, Caufield & Byers is forming a "Green Growth" fund for green-tech start-ups looking to scale up their operations.
PEWeek reported on Thursday that the fund will be over $400 million and have input from Kleiner Perkins partner Al Gore.
The idea behind a late-stage funds such as this is to give up-and-coming companies the money to ramp up, rather than develop their core technology.
Google.org, the philanthropic arm of Google, has also chosen to invest this sort of capital as part of its energy initiative to avoid what is called the Valley of Death--the transitional terrain that start-ups face when shifting from technology development to commercialization.
Doerr said that although there were pockets of green tech where too much money is chasing too few good deals, the amount of money going into energy is far too little to address climate change.
Kleiner's first green-tech fund was closed in 2006.