シェールガスの話　地球の歴史　その１０６　世界を変えたシェール革命は石油欠乏時代の幕開けという話

The shale revolution has once again made the United States the world's number one oil-producing country. However, it was also a desperate measure that heralded the beginning of an era of oil scarcity. We will discuss this issue from the perspective of Canada's oil sands and Venezuela's Orinoco tar.