Which one of these uses wind?
basketballs
hot air baloons
wind turbines
tires
What type of gas is lighter than air?
helium
oxygen
nitrogen
carbon dioxide
Which one of these uses wind?
balloons
basketballs
tires
kites
Which pollutant is produced by vehicles but not by power stations?
smoke and soot
lead
sulphur dioxide
carbon monoxide
What is another use of nitrogen?
glue
food
soap
fertilizer
Which source of pollution produces the most smoke and soot?
power stations
vehicles
Which source of pollution produces the most carbon monoxide?
carbon monoxide
vehicles
What is dry ice? It is frozen...
water
nitrogen
oxygen
carbon dioxide
What makes soda bubbly?
carbon dioxide
helium
oxygen
nitrogen
Which one of these uses helium?
balloons
basketballs
hot air balloons
tires
The main cause of air pollution is...?
trash
bird poop
fumes from vehicles
oil spills
Which of these things need oxygen?
fertilizer
plants
fire
ice
Which source of pollution produces the most sulfur dioxide?
vehicles
power stations