200 world should be from your mind. not from internet

 We know that the Earth has a carrying capacity but we really don't know what size population the Earth can support before suffering deterioration. We also know that the Earth's population will only continue to grow. If the population reached a point where it became a threat to the Earth, would you be in favor of limiting the population either with a policy similar to China's one child policy or something else? Why or why not? What would you recommend to address the Earth's growing population?