Why prevents orangutans from going extinct?

To stop orang outangs from going extinct we must manage to keep enough males and females alive that their offspring can mate without suffering from inbreeding, which could cause all kinds of genetic problems.

There are only two ways to do this. Either we manage to keep enough of them in captivity (in zoos and private collections) that they can keep breeding, or we must preserve enough of their natural habitat that the population can survive on the food available there, and protect them from being killed by hunters. In both cases there will be problems. When the population is small, it doesn't take much to make it go exinct. For example, a disease could spread among them and kill enough of them that the few remaining animals cannot breed enough to allow the species to survive. Or, if the animals are in the wild, the population could be broken up into small groups - as the forest they live in is cut down into smaller and smaller patches, for instance. These small groups cannot survive in isolation and cannot reach other groups, so they are doomed.

It will not be easy to stop the orang outangs from becoming extinct. Unfortunately this is also true for all of the other great apes, our closest cousins.

Also, you can cut down on, or not use at all palm-oil. You may find it in some toothpastes, shampoo, and others.