The true costs of our electricity
Way Kuo says our calculation of the least costly way to generate electricity will be skewed, as long as the environmental harm of the use of fossil fuels is not properly accounted for
Smog is a major problem facing Beijing and many other places on earth today. It is also a reminder that environmental pollution has reached a critical point in human history.
The recent documentary Under the Dome, an in-depth report on environmental problems in China by Chai Jing , has triggered a heated debate over the credibility of its sources. But the debate has sidestepped one of the critical issues facing humanity: greenhouse gas emissions and their impact on the environment and the sustainability of earth.
Energy is a necessity in modern life. Our dependence on electricity has left noticeable carbon footprints on nature. Of the broad spectrum of energies, fossil fuels (coal, natural gas and oil) are still the major energy sources for electricity generation, accounting for 67 per cent of world electricity production as of 2012, in spite of pledges by governments around the world to increase the use of renewable green energies. The rest comes from cleaner energies like hydroelectric (17 per cent) and nuclear (11 per cent).
According to the Intergovernmental Panel on Climate Change, approximately 37 per cent of total carbon dioxide emissions are from electricity production, especially from burning coal. The level of atmospheric carbon dioxide is building up and that build-up is accelerating as electricity demand is expected to increase by 43 per cent over the next 20 years.