Low oil prices offer good opportunity to launch variable carbon tax

Washington

OVER the last few decades, oil prices have fluctuated widely - ranging from US$10 to US$140 a barrel - posing a challenge to producers and consumers alike. For policymakers, however, these fluctuations present an opportunity to advance the key global objectives - reflected in the Sustainable Development Goals adopted last September and the climate agreement reached in Paris in December - of mitigating climate change and building a more sustainable economy.

Recent oil-price fluctuations resemble the classic cobweb model of microeconomic theory. High prices spur increased investment in oil. But, given long lags between exploration and exploitation, by the time the new output capacity actually comes on stream, substitution has already taken place, and demand of…