Energy efficiency is arguably the most promising strategic area to reduce greenhouse gas emissions. By decreasing energy demand, energy efficiency initiatives help reduce:
- The pressure on our energy system
- The amount of installed clean energy capacity required to substitute current fossil fuel production
- Our dependence on foreign fossil fuels, thereby increasing energy independence and stability
While countries have the ability to drastically decrease emissions through energy efficiency measures, their levels of investment and implementation of these options have been mixed.
McKinsey & Company – a multinational management consulting firm – has done several studies on the emissions reduction capacities of different nations – evaluating different measures available to each country and the cost-effectiveness (cost per ton of CO2e reduced) of their implementation. In these studies, McKinsey often uses a Marginal Abatement Cost Curve (MACC) to help illustrate each option’s cost-effectiveness (on the Y-axis) and emissions reduction potential (on the X-axis):
McKinsey takes a good look at the emissions reduction potential available through energy efficiency initiatives. Their results show that energy efficiency options tend to have a net economic benefit to society – the total benefits to society are greater than the total costs over the lifetime of the project. Three examples – case studies for the US, China, and India – are looked at in detail: