A substance is considered biodegradable if it can be broken down by biological processes, typically involving bacteria, fungi, or other saprophytes. These substances are naturally decomposed into simpler, harmless compounds over time.

Enzymes are specific in their action, meaning they are designed to break down only certain types of substances. Each enzyme targets a specific type of molecule, which is why not everything we consume, like coal or plastics, can be digested ...

Burying waste materials in a pit or a container covered with soil is a method to observe the decomposition process. This helps in understanding how different materials break down over time and the rate at which they do so.

Pesticides are chemicals used to protect crops from diseases and pests. They help in crop preservation and yield enhancement.

Ozone in the atmosphere is formed when higher energy UV radiation splits molecular oxygen (O₂) into free oxygen (O) atoms, which then combine with molecular oxygen to form ozone (O₃).