1
we are contaminating it
2
if we burn the trees this it increases
3
they inhabit the forest
4
They are of beautiful colors
5
if we throw away them to the rivers we contaminate them
6
they contribute vitamins to the organism
7
It diminishes for the lack of water
8
They generate it and they purify the trees
9
they elaborate their own food
10
to newspaper we receive their heat
11
it illuminates in the nights
12
we need it cigar for the lungs
