The UK's energy minister said his "Green Deal" plan for business would be so radical it would be hated by some.
Ed Davey told the Scottish Lib Dem conference in Inverness he would announce details of the project soon.
He said he was "giving notice" to businesses and local authorities to get serious about saving energy and saving people money.
Mr Davey also told the conference that he was "immensely proud" of the work done by his predecessor, Chris Huhne.
Lib Dem MP Mr Huhne resigned as energy secretary at the beginning of February after learning he would be charged with perverting the course of justice over a 2003 speeding case.
Party delegates heard Mr Davey say: "One month into the job, I now understand even more deeply than before what fabulous work Chris did to take forward the Liberal Democrats' pioneering and longstanding commitment to the environment. To make our coalition the greenest government ever."
He said he would push ahead with his predecessor's plans and go on to create a "whole new market" in the form of the "Green Deal" business model which would live "without subsidy or regulation".