Planet Earth: 1. Population: 0. This catastrophe is no less real than the possibility of human extinction due to overpopulation. Here's the wake-up call. Zero population growth is the only plausible solution to the demographic crisis. It is reaching levels where famine, lack of drinking water, deforestation and the depletion of natural resources are only superficial scratches. The underlying problem, overpopulation, is the real social, environmental and health threat. One of the problems arising from overpopulation is the depletion of natural resources and the decline of biodiversity. More than eighty percent of the planet's old-growth forests have been destroyed, taking with them the habitats of countless species ("human population growth"). When species' habitats are destroyed, stranded animals are helpless and do not survive. Additionally, each year, more than thirty thousand acres of forests are cut down to make paper products used in homes and businesses. Faced with increasing pressures on the environment, it is essential to slow population growth. Without it, even more trees...