So Many People According to John W. Kimball (2010), right now there are approximately 6.9 billion people in the world. Experts predict that the number of people will continue to grow because better medicine and nutrition allow people to live longer. By 2050 the Earth may have as many as 9.6 billion people! All those people: Consume a lot of water, food, building supplies and fossil fuels. Make a lot of TRASH!