Unit 7 · Energy in Daily LifeNoise Pollution
Words from This Lesson
- Noise pollution: loud sound in the environment that does harm to living things.
- Noise: sound that has a negative effect on human beings.
- Hearing power: the ability of the ear to hear sound.
- Eardrum: the thin membrane inside the ear, which a very loud sound can tear.
- Silencer: the part of a vehicle or machine that cuts down the sound it makes.
- Tree planting: the work of planting trees, which also helps to block sound.
- Public awareness: the work of making ordinary people alert to an issue.
- Reduction: the work of cutting down a harm or a problem.