The Energy Efficiency Market Report 2014 (EEMR 2014) estimates that investment in energy efficiency markets worldwide in 2012 was between USD 310 billion and USD 360 billion. Investment in energy efficiency was larger than supply-side investment in renewable electricity or in coal, oil and gas electricity generation, and around half the size of upstream oil and gas investment. Investment in energy efficiency is distributed unevenly across countries and energy-consuming sectors (buildings, domestic appliances, transport and industry).