Ecology and Life Safety

1. Effects of human activities on the natural environment.
4. Variety of life forms within a given ecosystem or on Earth.
7. Something with the potential to cause harm or danger.
8. Decline in land quality due to human activities or natural processes.
11. Study of populations of organisms and how they interact within an ecosystem.
13. Achieving net-zero carbon emissions by balancing emissions with removal.
14. A relationship where one organism benefits while the other is harmed.
15. A stable state in an ecosystem where species and resources are in harmony.

2. Introduction of harmful substances into the environment.
3. Large-scale removal of forests, often for agriculture or development.
5. Measures taken to maintain hygiene and prevent disease.
6. The continuous movement of carbon through the atmosphere, living organisms, and the Earth.
9. Organisms that can survive in a wide range of environmental conditions.
10. Living organisms or toxins that can cause disease or harm to humans.
12. Accumulation of salts in soil, reducing its fertility.