비슷하게, 예전엔 석유사용을 크게 줄이려면 비용이 너무 많이 든다고 했죠. 아니었다면 이미 그리하고 있을 거라면서요. 시장은 기본적으로 완벽하니까요.
Now, similarly, the old story about oil is that if we wanted to save very much of it, it would be expensive, or we would have done it already, because markets are essentially perfect.