← Have an idea? Share it! Settings and activity 1 result found massively invest in making existing homes energy efficient 2 votes Vote Vote Vote Vote We're glad you're herePlease sign in to leave feedback Signed in as (Sign out) Close Close 1 vote 2 votes 3 votes Remove votes You have left! (?) (thinking…) 0 comments · Obama CTO · Edit… · Delete… · Admin → anonymous shared this idea · Nov 13, 2008