According to a report from the conservation group, WWF, humans are using natural resources at an unprecedented rate, which will lead to needing the equivalent of two planets by 2050. Populations of many species have dropped by approximately a third in just a little over the last thirty years, because of human-caused pollution, deforestation and other factors. Meanwhile, global human population has now reached 6.5 billion, another half a billion in just a few years since the turn of the milllenium, and over double the population of 3 billion in 1960. The Unites States just hit the landmark of 300 million in population, and the less developed countries generallly have even greater rates of population growth. Developed nations tend to have the greatest impact on natural resource depletion in many areas, yet the huge populations of less developed nations have an enormous impact on the vicious cycle between pollution, resource depletion, poverty and violence. Given the possibility that it will take the equivalent of two Planet Earths to sustain life on earth at the current rate of resource depletion, should people voluntarily restrict their reproduction to replacement, or two children per couple?