The new facility was due to be in St Fergus in Aberdeenshire but is now set to be built on the Humber and around Liverpool.
More than half of homes with energy performance certificates fall into the lower D to G grades.
Industry leaders believe buses can be part of the solution with a shift from private cars to sustainable transport.
Boris Johnson will launch the UN talks with a speech setting out Britain's stall as a leader on tackling climate change.
