Scientists have estimated that over 40,000 different kinds of animals are going to be extinct in the next few years.Why will they be extinct?The reasons are as follows：
First,natural Factors.Second,artificial reasons are the most important.Those who kill and eat wild and precious animals,like tigers,lions,elephants and rhinoceroses,make a lot of money by selling the animals‘skin,horns and even guts.How cruel they are!
Take tigers for example,they‘re disappearing.Humankind destroys their habitat.In the last century,the world’s population of tigers has dropped by 95 percent.However,the whole world eventually wakes up and starts trying their best to give the rare animals a better environment.They make a lot of strong laws to protect animals form being harmed and punish those selfish guys who hurt these valuable animals.But that‘s not enough.We not only have to protect those endangered species,but also have to refuse to eat and buy them.Maybe those animals will be able to survive in the future.