Leia o texto e responda às questões 4 e 5: THE WATER WE DRINKThe water we drink usually comes from
Leia o texto e responda às questões 4 e 5: THE WATER WE DRINKThe water we drink usually comes from reservoirs, lakes
or rivers. A large number of cities use river water and
dumps back into the river. Sometimes another city
downstream uses the same water. This water may be
badly polluted with chemicals and pathogenic bacteria.
Many different chemical treatments are necessary to
make it safe and palatable.
Many communities add some form of fluorine to their
water. Fluorine in concentration of 0.7 to 1.0 ppm
(parts per million) can significantly reduce tooth decay
in children.
Smaller communities usually obtain water from wells.
Even they have problems because sometimes the
ground water is contaminated by nitrates. These
nitrates come from agricultural fertilizers and from the
decomposition of organic waste.
What can we do? We can fight for clear water and
convince our neighbors to do the same. We can
demand an end to water pollution industries and cities.
And, finally, we must know how to use the water of the
earth because that is all the water we have.
4- Analise as afirmativas abaixo como verdadeiras ou
falsa e assinale a alternativa certa.
( ) Nitrates pollute the water.
( ) People dump purified water into the water.
( ) We usually drink water from reservoirs.
( ) Fertilizers purify the water.
( ) We can’t drink safe water.
a) V, F, V, F, V.
b) F, V, V, V, F.
c) V, F, V, F, F.
d) F, F, F, V, V.
5- Escolha a alternativa correta de acordo com o texto
acima:
We can:
a) demand an end to water pollution.
b) stop the decomposition of organic wastes.
c) use river to purify the water.
d) convince our neighbors to use fluorine.
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