Pretty much ANY substance can pollute if misused, overused, or whatever. But we are learning more and more all the time how to use the substances on Earth in ways that pollute less or not at all. We should continue to do that.
You won't find anyone more passionate than I am about good stewardship of the Earth and protecting the environment we live in as well as the flora and fauna that currently exists on it.
I also know that evolution did not cease to exist with this era and the paleontological record shows that for all of the time they have existed on Earth, species of both plant and animal have evolved, changed, gone extinct and new species have developed. Also environments, weather patterns and climate have also changed and continue to change over time and that too is inevitable.
History informs us that in almost all cases it is the private sector, not government, who recognizes and meets the needs and wishes of the people, and that they do this better when there is liberty and an intelligently regulated free market economy. As it becomes apparent that fossil fuels can't or won't meet those needs or wishes, the people will have discovered and developed alternate forms of energy that are better and more sustainable just as they always have.
And common sense tells us that all of humankinds most draconian means to affect climate change have had negligible effect on climate change. We should give up trying to control climate and focus our energies on helping humankind live happily, healthily, and productively in spite of climate change.
That is my approach to the problem.