CO2 emissions. Energy White Paper, 2003 The UK Government published its white paper on energy ("Our Energy Future – creating a Low Carbon Economy") in 2003, establishing a formal energy policy for the UK for the first time in 20 years. Essentially, the white paper recognised that a limitation of carbon dioxide ( – the main gas contributing to global climate change) was going to be necessary. It committed the UK to working towards a 60% reduction in carbon dioxide emissions by 2050, and identified business opportunities in so doing: a recurrent theme throughout the document was "cleaner, smarter energy". It also claimed to be based on four pillars: the environment, energy reliability, affordable energy for the poorest and competitive markets. The White Paper focused more on analysing the issues than in providing detailed policy responses. Some detail began to filter through in a series of follow-on documents, including an Energy Efficiency Implementation Plan (April 2004) and the DTI Microgeneration Strategy "Our Energy Challenge" (March 2006). Nonetheless, most of the policies were a continuation of business as usual, with emphasis on market-led solutions and an expectation that consumers act rationally, for example in installing energy efficiency measures to make running cost savings. In November 2005 it was announced that the government, under DTI leadership, would undertake a full-scale Energy Review, and over 500 organisations and individuals made detailed submissions as part of this review. Officially, the review was to take stock of the outcomes to date of the White Paper, which a particular focus on cutting carbon (emissions of which remained stubbornly high) and to look in more detail at security of supply, as the UK's oil and gas production from the North Sea had peaked, and Russia was seen as being a high-risk supplier of gas. Unofficially, it was widely felt that the real reason behind the review was to allow nuclear power back into the energy debate, as it had been sidelined in the 2003 White Paper. That document had said "This white paper does not contain specific proposals for building new nuclear power stations. However we do not rule out the possibility that at some point in the future new nuclear build might be necessary if we are to meet our carbon targets. Before any decision to proceed with the building of new nuclear power stations, there will need to be the fullest public consultation and the