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1. 
THE IMAGE BELOW REPRESENTS
A.
THE BURNING OF FOSSIL FUELS
B.
THE CHEMICAL FORMULE OF NITROGEN OXIDES
C.
THE INFERTILITY OF SOILS
D.
THE ILLNESSES IN HUMANS
2. 
THE VISIBILITY REDUCTION REFERS TO
A.
An acid rain cause
B.
An acid rain effect
C.
An effect of using HFCs products
D.
A Type of acid rain
3. 
Which is the reason why fishes die in the rivers?
A.
They eat too much fat food
B.
They drink acidic water from rivers
C.
They drink alkali water from rivers
4. 
WHICH ARE THE COLOURS OF THE SUNLIGHT THAT HUMANS SEE?
5. 
WHAT IS THE FUNCTION OF THE OZONE LAYER
6. 
WHAT IS THE ACID RAIN