How is earths climate changing?

40 years ago scientists said that the earth is getting colder and and ice age is coming. The scientists are looking only at a small part of the statistics because they do not have all of the earth statistics so climate change is not real. Could we do something to make our environment cleaner? Yes!

Now I know you need an answer so the claim is that the people are polluting with cars and factories and the climate is getting warmer