Слайд 21-st:
We can make some rubbish bins for all types of trash and
posters that will remind people to throw it away!
Слайд 32-nd
We also can make posters and tell people to save water and
electricity.
Слайд 4
We need to do this because more than 750,000 people in
the world suffer from water deficit and you can help them just by turning off tap.