Jane Goodall @ Davos: "All these [environmental] things we talk about wouldn’t be a problem if there was the size of population that there was 500 years ago.”

The world population 500 years ago is estimated btwn 420 and 540 million — 6.7 billion fewer people than today. pic.twitter.com/Aa8aztiAeZ

— Tom Elliott (@tomselliott) January 24, 2020