Cornell University ecologist David Pimentel and colleagues estimated that the earth might be able to sustain only 2 billion people by the end of the fossil fuel era. There are about 7.5 billion humans on the planet right now. It seems counterintuitive that there is nearly 4 times the sustainable population now living on the […]
In the environmental debates of the 1970s, one common name hurled at environmentalists was to call them “neo-Malthusians.” This dismissive insult was meant to imply that the concern for environmental issues was nothing more than the contemporary application of the failed analysis of Thomas Malthus (1766-1834). Malthus was a classical economist in the tradition of […]
I am inspired by students from Dalhousie University in Halifax who have been getting tattoos. These are simple tattoos, just three digits, placed somewhere conspicuous. The number is the concentration of carbon dioxide in the Earth’s atmosphere in their birth year. Were I inclined to get a tattoo, mine would be 319. Since my birth […]
