What can be done to protect plants and animals species from extinction?

Charity's are a great way to save species of plants and animals as they often use the money to buy protected areas where the animal or plant can grow/live without being harmed, growing plants in a fake environment with perfect conditions can rise the number of there kind of plant then they can be replanted in there natural habitat. Animals can be bred in captivity and set into the wild to help increase the numbers of there species. unfortunately, some people are more interested in hunting them for money or destroying the plants to make way for something else.