For many observers, the bloom is off cleantech venture investing.  The challenges are numerous and increasingly well-known:  capital requirements...

In recent months, I’ve come across more work being done in flow batteries than I’ve seen in the prior decade. I’ve been known in the past to say...

As previously reported by GigaOm and others, one of our bloggers, cleantech venture capital investor, David Anthony, of VC firm 21 Ventures, took...

When Home Performance with Energy Star launched in Maine in 2006, we defined the energy improvement process as test-in, upgrade, test-out. The...

Here’s a musical experiment for you:  play a song such as ”Penny Lane” from The Beatles (or, if you prefer classic rock, “Whole Lotta Love” by Led...