How quickly is the world's population growing? In the United States and other developed countries, the current growth rate is very low. In most developing countries, the human population is growing at a rate of nearly 3 people per second. Because of this bustling growth rate, the human population is well on its way to reaching 9 billion within lifetime.
世界人口的增长速度有多快？在美国和其他发达国家，目前的增长率非常低。在大多数发展中国家，人口正以几乎每秒3人的速度增长。由于这一惊人的增长速度，人口将在有生之年达到90亿。
