Speakers at Brainstorm GREEN have been stopping by Fortune's virtual conference to take questions from online attendees:

Waste Management CEO David Steiner took questions online

• Bill Weihl, Green Energy Czar, Google (GOOG)

What comments might [you] have about the "Bloom Box" replacing a National Grid?
Weihl: There's a role for both distributed generation and centralized power plants -- I expect we'll see both -- and the Bloom Box will play a part in distributed generation.

Last year Google bought a decommissioned papermill site in Finland and converted it into a datacenter. Has that project delivered on its promise and what prospects are there for similar projects in the U.S. given that over a dozen papermills were shut down in the U.S. last year?
Weihl: Our Finnish site is not yet open, but we fully expect it to deliver on its promise. We're always looking for new sites, and if there are similar sites in the U.S. we will consider them.

What are some of the best practices that need to be more widely adopted to increase the use of renewables and reduce the energy used by datacenters? More