Resolving Opposites

I know not my identity,
but yours I find opposing.
What outcome of this counter be,
the changes at its closing.

It's at the equator I stand;
the sun bears down unimpeded;
when need for cooling, not at hand,
intensely, solely needed.

The pole on which you do exist,
a warming influence is lacking;
though heating efforts do persist,
external sources, only, lacking.

The insulation of the polar bear,
metabolism of the whale,
in the environment to fare,
for humans will only fail.

Inventiveness of humankind,
to make living unforbidden,
a climate continental find,
or with technology overridden.

To make environment fit for all,
I find no solution single;
so, area, although large or small,
is remedied with a jingle.