Planetary boundaries (Johan Rockstrom)

In 2009, a group of 28 internationally renowned scientists identified and quantified a set of nine planetary boundaries within which humanity can continue to develop and thrive for generations to come. Crossing these boundaries could generate abrupt or irreversible environmental changes. Nothing really new in this video (see for example, 1972 Limits to Growth study validated (CSIRO)), but it provides a clear and visual summary.