Everyone can see changes in the climate. I first noticed the amount of snow change each year. Climate change has been politicized.
My opinion is Climate change is real. The question is how much man contributes to it. Also, how much the USA contributes to it. Scientists are having a real credibility issue with this subject and Covid. There has been too much exaggeration. Also, how much can first word countries affect climate change while 3rd world countries are still emitting orders of magnitude more pollution. How much is normal patern caused by the way the sun and planets in the solar system are interacting with the earth.
Ice core samples.