@kravietz shortages happen under capitalism all the time. You also end up with recurring recessions and wars. Right now capitalism is literally killing our biosphere and there is a distinct possibility that it will make us go extinct along with the rest of the complex life on this planet.
@yogthos also states with Marxist economy inflicted most damage on environment, not only turning large areas of Asia and Europe uninhabitable due to contamination (Kyshtym, Chernobyl) or desertification