What is the substance that causes undesirable change to the environment?
What is the substance that causes undesirable change to the environment?
وہ کون سا مادہ ہے جو ماحول میں ناپسندیدہ تبدیلی کا سبب بنتا ہے؟
Explanation
- A pollutant is a substance or energy that causes pollution.
- It is an undesirable change to the environment.