The human population has been growing since the 15th century in Europe and its been growing ever since.  The population continues growing but at a slower rate. The human population is expected to reach 10 billion by 2058, if the population continues to grow, ( which is predicted to grow) the humans will out compete other species, which can lead to a lot of animals going extinct. The planet will no longer be  able to sustain the growing population and we will end up reaching the carrying capacity. As our population grows other populations of other species will drop, we will end up killing them all. As humans it is our responsibility to look after the other species that we are out competing.