| The earth is our common home. The only house we
have. When we imagine the unimaginable distances
of space, the heart freezes at the thought that
we are still alone in the universe. If there are
habitable planets somewhere near distant stars,
it doesn't matter to us yet, because of the huge
distances we can't contact them.
It's creepy to think that our planet is very
vulnerable, because it is threatened by many external
dangers, for example, meteorites, harmful radiation,
magnetic storms and so on. For a good life on
Earth, the balance of the entire system is necessary:
both the Sun and the Moon should be approximately
in the same places where they are now.
If they move away from us or approach us, this
delicate balance will be disturbed - it will be
either too cold or too hot, the tides will stop
or become so high that everything will be washed
away in its path. Or terrible earthquakes or volcanic
eruptions will begin, which even now bring a lot
of troubles.
For example, they can pollute the atmosphere
so much that the sun's rays will not reach the
surface of our planet well and a sharp cold snap
will occur. This has happened more than once in
our history. Many great civilizations could have
perished just like that, and not because of wars
or palace coups at all.
Humanity, due to the rapid development of technology,
has become too much to influence the state of
the environment, sometimes causing irreparable
harm to nature. Due to human activity, many species
of animals and plants disappear very quickly,
the surface of forests decreases, water, air,
and soil are polluted.
It's time for people to understand that the resources
of the planet are not infinite and descendants
can inherit a planet that is not adapted for life.
We need the efforts of all people to preserve
our beloved space home.
|