Match the major outdoor pollutant with its description.

What kind of technology makes materials from atoms and molecules at an extremely small scale?

Deforestation in tropical rainforests is mainly for – 

Of the following types of mining, which type is mostly used on mountains?

Name one plant that is used to make tree-free paper products.

The risk that causes the greatest numbers of death per year is poverty. Why?

Which of the following is not a cause of food insecurity?

What highly toxic compound is used to extract gold from rock?

Only _______ of the planet’s enormous water supply is readily available to people as liquid freshwater. 

What is raw sewage?