2. environmental pollution
3. be the cause of the disease
4. industrial waste
5. safe travel
6. lack of water
7. cure the patient
8. type of animals
9. unusual mammals
10. include in the list
2. environmental pollution
3. be the cause of the disease
4. industrial waste
5. safe travel
6. lack of water
7. cure the patient
8. type of animals
9. unusual mammals
10. include in the list