Urban Air Wuality

Question 1

What is photochemical smog
How is it made
Why is it bad

Answer 1

Pollutants like hydrocarbons and land nitrous oxides come from burning fossil fuels

These pollutants break down into harmful chemicals when in contact with sunlight

Photochemical smog is linked to health problems like breathing difficulty’s

Question 2

How can pedestrianisation reduce air pollution

Answer 2

Vehicles are restricted from entering places at certain times - reducing pollution

Shops often have fewer customers as many can’t get their walking

Question 3

What are biofuels and how can it reduce air pollution

Answer 3

Biofuels are fuels produced from plants - lower particulate emissions and can replace petroleum and diesel

Crops needed to make them can lead to less biodiversity

Question 4

What is liquefied petroleum gas and how can it help reduce air pollution

Answer 4

LPG is a gas produced from fossil fuels that have lower emissions than petroleum or diesel

It still burns fossil fuels
Cars have to be converted and service stations have to be adapted to distribute it

Question 5

What are particulates

Answer 5

Particulates - tiny pieces of solids and tiny droplets of liquids floating in the air

Question 6

Why is photochemical smog more common is hotter climates

Answer 6

Because there’s more sunlight to break down the pollutants