Cattle emit a zillion tons of so-called greenhouse gas every year. Should the world's population become vegans ? The 6 billion plus humans on the planet create a great deal of waste by their collective #1 and #2. Should we start reducing our own numbers to reduce these wastes? Human's emit CO2, which is supposedly a pollution. The list goes on and on. However, one giant volacano blast emits more greenhouse gas than all us humans combined and then some. Should we invest in a giant cork ?