presentation group 4

What is the air quality index in Hanoi?

• 1010

• 214

• 341

• 314

what is not the solution to air pollution in place?

• air purfication

• car-pooling

• zero-emission vehicles

• plant many green trees

among the proposed solutions to prevent water pollution, which one is the most important?

• littering the prescribed places

• propagate with the people

• limit the use of cleaning chemicals

• add more trash cans and community toilets

What are four basic types of pollution?

• Biodiversity, alternative energy,air, water

• Soil, water, biodiversity, noise

• Water, light, noise, soil

• Air, water, soil, noise

When did outdoor pollution first become a significant problem?

• Since 2000

• The World war I

• industrial revolution

• The world war II