If there were no moisture or
carbon dioxide in the atmosphere
,the earth's average temprature would only be- 18*C(0*F).
But the presence in the atmosphere
of small quantities of the above and
several other gases,helps to trap the sun's heat.
This natural insulation is vital to our survival.But the gases
involved seem to have increased during
the last century,trapping more
heat and warming up the atmosphere.
The increase may be due to human
activities and the gases may well
double in concentration in the coming decades,
with dire consequences.
carbon dioxide in the atmosphere
,the earth's average temprature would only be- 18*C(0*F).
But the presence in the atmosphere
of small quantities of the above and
several other gases,helps to trap the sun's heat.
This natural insulation is vital to our survival.But the gases
involved seem to have increased during
the last century,trapping more
heat and warming up the atmosphere.
The increase may be due to human
activities and the gases may well
double in concentration in the coming decades,
with dire consequences.
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