Something not discussed is the why. Why would we want more or less people. The less people, the less pollution. The more people, the more ???.
One way we have been able to have this many people, are modern farm practices. But those rely heavily on chemicals. Which is not ideal(dead ecosystems, poisoned water). Just because we can, doesn't mean we should.
One way we have been able to have this many people, are modern farm practices. But those rely heavily on chemicals. Which is not ideal(dead ecosystems, poisoned water). Just because we can, doesn't mean we should.