To focus on energy efficiency is to make present ways of life non-negotiable. However, transforming present ways of life is key to mitigating climate change and decreasing our dependence on fossil fuels.
Energy efficiency policy
Energy efficiency is a cornerstone of policies to reduce carbon emissions and fossil fuel dependence in the industrialised world. For example, the European Union (EU) has set a target of achieving 20% energy savings through improvements in energy efficiency by 2020, and 30% by 2030. Measures to achieve these EU goals include mandatory energy efficiency certificates for buildings, minimum efficiency standards and labelling for a variety of products such as boilers, household appliances, lighting and televisions, and emissions performance standards for cars. 
The EU has the world’s most progressive energy efficiency policy, but similar measures are now applied in many other industrialised countries, including China. On a global scale, the International Energy Agency (IEA) asserts that “energy efficiency is the key to ensuring a safe, reliable, affordable and sustainable energy system for the future”.  In 2011, the organisation launched its 450 scenario, which aims to limit the concentration of CO2 in the atmosphere to 450 parts per million. Improved energy efficiency accounts for 71% of projected carbon reductions in the period to 2020, and 48% in the period to 2035.  
What are the results?
Do improvements in energy efficiency actually lead to energy savings? At first sight, the advantages of efficiency seem to be impressive. For example, the energy efficiency of a range of domestic appliances covered by the EU directives has improved significantly over the last 15 years. Between 1998 and 2012, fridges and freezers became 75% more energy efficient, washing machines 63%, laundry dryers 72%, and dishwashers 50%. 
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