R. Buckminster Fuller's 1969 book imagines humanity as a crew aboard a tiny spaceship traveling through infinity. We have limited water, food, and fuel. Because of our proximity to the sun, we are given a limited budget of additional fuel which allows growth of food, trees, and fish. The sun's energy input also cycles our water and air. We even have past energy from the sun stored up in the form of coal and oil.
What happens if we use up more food and energy each year than the Earth/Sun system can regenerate? Each year Global Footprint Network calculates humanity’s Ecological Footprint (its demand on cropland, pasture, forests and fisheries) and compares it with global biocapacity (the ability of these ecosystems to generate resources and absorb wastes). They declared that today (Oct. 9th) is Global Overshoot Day, the day we passed our biocapacity limit.
"We are clearly drawing natural capital ... the point about collapse is that we don't know when some of the systems in the global atmosphere and fish will collapse but we do know that collapse is a very real possibility" says Professor Tim Jackson, head of sustainable development at Surrey University via The Independent)
We are living beyond our means. Earth's six billion inhabitants and their rising living standards are putting an intolerable strain on nature.
The biggest problem relating to the over-consumption of resources is climate change, but its other effects include deforestation, falling agricultural yields and overfishing.
Overfishing should be easy to understand. If you harvest fish with nets faster than they can reproduce, pretty soon there are not enough fish. Remember what happened at Red Lake.
Global Footprint Network is committed to fostering a world where all people have the opportunity to live satisfying lives within the means of Earth's ecological capacity. You can read about their accomplishments and publications here.