And that's probably because that's when everybody got aware of the environment and Earth Day and all the stuff that happened in the '60s with the Hippies and everything really did, I think, have an affect on global awareness.
たぶん 誰もが環境に注目するようになり 地球の日や ヒッピーなどと共に 60年代に起こったすべてのことは 地球環境への意識を高めたと思います