Renewable Energy Will Not Support Economic Growth
Container terminal image via shutterstock. Reproduced at Resilience.org with permission.
The world needs to end its dependence on fossil fuels as quickly as possible. That’s the only sane response to climate change, and to the economic dilemma of declining oil, coal, and gas resource quality and increasing extraction costs. The nuclear industry is on life support in most countries, so the future appears to lie mostly with solar and wind power. But can we transition to these renewable energy sources and continue using energy the way we do today? And can we maintain our growth-based consumer economy?
The answer to both questions is, probably not. Let’s survey four important sectors of the energy economy and tally up the opportunities and challenges.
The electricity sector: Solar and wind produce electricity, and the fuel is free. Moreover, the cost of electricity from these sources is declining. These are encouraging trends. However, intermittency (the sun doesn’t always shine, the wind doesn’t always blow) still poses barriers to high levels of solar-wind electricity market share. Grid managers can easily integrate small variable inputs; but eventually storage, capacity redundancy, and major grid overhauls will be necessary to balance inputs with loads as higher proportions of electricity come from uncontrollable sources. All of this will be expensive—increasingly so as solar-wind market penetration levels exceed roughly 60 percent. Some of the problems associated with integrating variable renewables into the grid are being worked out over time. But even if all these problems are eventually resolved, only about one-fifth of all final energy is consumed in the form of electricity; how about other forms and ways in which we use energy—will they be easier or harder to transition?
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