Quoting from the Denver Post article:
"Holli Riebel, the group's co-chair and chief executive of the Colorado BioScience Association, said the level of venture capital investing has been decreasing for several years. 'Our No. 1 concern among our companies and institutions is attracting capital,' Riebel said. The group recommended creating tax incentives for private investment into companies caught in a funding gap. The report said many clean-energy companies fall into a gap, or 'Valley of Death,' between early stage funding — for example, from the inventor's own pockets and angel investors — and debt and equity financing at the later stages because the risk and profitability of their technology does not fit into the typical investment parameters for capital sources."
Link to denverpost.com