Human Health

4. Treated sewage used as fertilizer, which may contain contaminants.
7. A medical process to protect against diseases by stimulating the immune system.
8. Microorganisms, such as bacteria or viruses, that can cause diseases.
10. A type of air pollution caused by the combination of smoke and fog, often from industrial and vehicle emissions.
11. Rays Ultraviolet radiation from the sun, which can cause skin damage and increase the risk of skin cancer.
12. A lotion or cream applied to the skin to protect it from UV rays.
13. A prolonged period of excessive heat that can lead to health issues like heat exhaustion or dehydration.
15. Harmful or disruptive levels of noise in the environment.
19. A toxic condition caused by exposure to mercury, which can damage the nervous system.
20. Contamination of water sources by harmful substances, such as chemicals or pathogens.

1. The process of breathing in air or substances into the lungs.
2. The process by which substances pass through the skin or other tissues into the body.
3. The acronym for equipment, like gloves, masks, or goggles, used to protect the body from harmful substances.
5. A disease caused by the uncontrolled division of abnormal cells, sometimes linked to environmental factors.
6. Toxic elements, like mercury or lead, that can accumulate in the environment and harm human health.
9. The process of swallowing substances, such as food, water, or contaminants.
10. An irritation or discoloration of the skin, often caused by contact with an allergen or contaminant.
14. A respiratory condition that causes difficulty breathing, often triggered by environmental factors like smog or allergens.
16. The presence of harmful substances in the environment, such as air, water, soil, or noise pollution.
17. Devices used to remove pollutants or allergens from the air.
18. Practices like hand washing and cleanliness to prevent illness and reduce exposure to contaminants.