A) clean air and water
B) recycling
C) harmful substance in the environment

A) loud music and traffic
B) birds singing
C) a gentle breeze.

A) to have shiny teeth.
B) to look good
C) to remove plague and prevent cavities

A) ride a bicycle
B) drive more cars
C) burn trash

A) it can cause stress and hearing loss
B) it help them sleep
C) it makes them happy.

A) after using the bathroom
B) after petting a dog
C) both a and b.

A) watering plants.
B) throwing garbage into rivers
C) drinking water

A) by shouting louder.
B) by listening to loud music
C) by covering your ears or using earplugs

A) sharing a tooth brush
B) not bathing regularly.
C) washing hands before mea

A) improved memory
B) difficulty concentrating
C) clean thinking