What do green walls really do? #shorts #science #SciShow

Traffic emits pollutants harmful to health, but plants can mitigate this by absorbing particles and using dry deposition. They also act as physical barriers, dispersing pollutants and reducing exposure. Trees are effective, but green walls can also help in limited spaces.

What is one way plants help reduce air pollution from traffic?

• By increasing humidity

• By absorbing pollutants through their roots

• By releasing oxygen

• By absorbing pollutants through their leaves

What is the main mechanism through which plants help in dry deposition?

• By growing taller

• By allowing particles to settle on their surfaces

• By releasing carbon dioxide

• By absorbing water

How do plants act as a physical barrier to pollutants?

• By changing the wind direction

• By absorbing all pollutants

• By blocking sunlight

• By swirling pollutants around their leaves

What is a suggested alternative if there is not enough space for trees?

• A small pond

• A 100 square centimeter green wall

• A sand pit

• A rock garden

What is the benefit of dispersion by plants?

• It reduces soil erosion

• It enhances the color of leaves

• It decreases exposure to pollutants

• It increases the growth rate of plants