Choose the correct answer.  

_______ the environmental protection project, the local river would have remained heavily polluted.

Choose the correct answer.  

Many endangered species will keep losing their _______ unless we reduce deforestation.

Choose the correct answer.  

The more environmental campaigns are organized, _______ people could be convinced to protect the environment.

Choose the correct answer.  

The huge crowd is _______ about the local water pollution, showing lots of signs and banners on the streets.

Choose the correct answer.  

In this zoo, some scientists are trying to _______ some species that are seriously endangered.

Choose the correct answer.  

_______ we continue to protest against overfishing, the government could pass more laws to ban it.

Choose the correct answer.  

Using _______ products which are not harmful to the environment is now becoming more and more popular.

Choose the correct answer.  

Some species might go extinct _______ we reduce deforestation.