Question

an invention that addresses the problem in nature of society

Answer 1

I want an invention that will remove pollution from the atmosphere.  The various green house gases and harmful chemicals get converted to useful ones or get liquidated and fall as part of a rain.

An invention so that the various harmful reactive chloroflurocarbons get converted to saturated compounds and then reach the ozone layer.

We create a small bomb like a gas bomb and release in the air.  that will do this magic.
 
In the city where pollution and dust are problems, we invent a spray that will spread in air and sit on the dust particles.  Then the dust will settle down on Earth.  This can be used to remove dust and other particles from air.

we need an invention that will absorb the  emissions from various vehicles.