Нужна ли запятая в предлагаемых случаях: Certain species of animals have become extinct and many more are now endangered. We all know that humans are the biggest threat to the survival of most animals. People hunt kill and pollute the habitats of a great number of species. So, what can we do to help them survive? To start with _______ it is important to make the destruction of animals' habitats illegal. Next, people who hunt animals illegally must face heavy fines and even long-term prison sentences. If these measures were in place, they would discourage people from committing such acts. Thus, this would protect both animals and the environments they live in. Another solution _______ would be to encourage people not to buy animal products. As a result _______ manufactures would produce fewer products made with the fur, skin or teeth of endangered species and other animals. Finally _______ it would be a good idea to create more national parks and protected habitats for endangered animals. This would allow them to live and breed in a safe environment. Therefore, their numbers would increase and the species would not disappear. To sum up _______ there are many ways to make the world a safer place for animals. Putting some of these ideas into action would definitely make life better for all in the animal kingdom.