Bill Martin ← Yahoo Feedback My feedback 1 result found Have the columns written by your tech staff include geothermal heat pumps, the carbonless route to REAL Zero Net Energy homes and buildings. 229th ranked Vote Vote Vote We're glad you're herePlease sign in to leave feedback Signed in as (Sign out) Close Close Vote We’ll send you updates on this idea Gathering feedback · 0 comments · Yahoo Tech · Delete… · Admin → How important is this to you? Not at all You must login first! Important You must login first! Critical You must login first! We're glad you're herePlease sign in to leave feedback Signed in as (Sign out) Close Close Bill Martin shared this idea · July 10, 2014