Is the climate changing? Most people can see this is the case. Can we prove this is man-made? For most people, the scientific method proves that this is true. For those who don’t believe in science, not so much, even though the change is much more rapid and dramatic than changes in the past.
Some of us would say that, even if it has no effect on climate change, it wouldn’t hurt us to clean our air and water. At the least, we might have less health and respiratory issues. At the most, we might slow or stop climate change.
Others say that there is no need to do anything until it will take us much longer and cost much more to do something.
And gravity, after all, is just a theory.