In the longer term (to 2050) it is considered possible to achieve absolute reductions in the tons of CO₂ we emit, as we replace existing coal-fired power stations with lower carbon emitting technologies. Many more options become available for diversification over this timeframe as lead times for building and roll-out are no longer a constraining factor and expected technological advances are realised. There is clearly a great deal of uncertainty introduced over this longer time frame, considering, among others, economic growth and the actual improvements in technology.

The following two graphs demonstrate two possible combinations of diversification options that reduce CO₂ emissions below 2007 levels in this longer-term. They show a projected relative contribution of energy efficiency and diversification options to the reduction of CO₂ emissions.