Lots of opinions here, both scientific and lay.
There are those who believe strongly that the temperature of the world is increasing due to pollution and concomitant green house gases and their deleterious effects on the ozone layer (and other impacts).
There are others who believe equally as strongly that the change in temperature is natural and a part of the cyclic nature of global warming and cooling taking place normally over thousands of years.
In spite of both sides claiming absolute proof of their position. I believe the conclulsive case has not yet been established.
All of that said, as stewards of the planet, there is good reason to be sensible in its care and feeding. Arrogance is the biggest threat.