4.9.3.2 - Properties and effects of atmospheric pollutants

Is carbon monoxide toxic?

Yes, Carbon monoxide is a toxic gas.

What properties make carbon monoxide very dangerous?

• It’s colourless

• It’s odourless

Describe the effect carbon monoxide has on humans.

Carbon monoxide can bind to the haemoglobin in our blood (that carries oxygen) and leads to less oxygen being transported around your body

This lack of oxygen in the blood can lead to fainting, a coma or even death

What does sulfur dioxide and oxides of nitrogen cause in humans?

Respiratory problems - if they’re inhaled

What substances can form acid rain?

Sulfur dioxide + oxides of nitrogen

These gases dissolve in clouds and form dilute sulphuric / nitric acid which then falls as acid rain

What are the impacts of acid rain?

Acid rains kills plants and damaged buildings and statues - as well as making metals corrode

What do particulate cause?

Particulates cause global dimming and health problems for humans.

Describe how particulates cause these problems.

• If particulates are inhaled, they can get stuck in the lungs and lead to respiratory problems

• Particulates (and clouds formed from them) are also able to reflect sunlight back into space - this leads to less light reaching the earth - causing global dimming