What would earth be like without any pollution?

That is difficult to answer as many forms of pollution could exist without human intervention at all and in some ways these pollutants still serve a purpose in regulating the environment. A good example would be volcanoes which release vast amounts of CO2 but are also responsible for building new land. read more

A world without excessive pollution that the natural environment cannot cure might be a world without China, the United States, Russia, India, Mexico, and Japan. It might be a world that has completely reversed the practices of the Industrial Revolution. read more

That’s exactly what French artist Thierry Cohen decided to show us with his series Villes éteintes (Darkened Cities), which imagines what major cities would look like without electricity and under a night sky free of smog. read more

Even things like vaccines and pain killers come from the military world. Without war, we would not been in the place that we are now. Without pollution - I am going to take this to mean no pollution from transport and modern living because is seems in line with what you have said (Everything causes pollution, it just depends on what it is). read more