Climate change makes sense to me - from what I've read and heard I've worked it out as follows:
Way way back when the planet was a relatively newly formed mass in space large areas of the earth was covered with hot steamy swamps growing giant trees and ferns and plants like marestail photosynthesising like mad, taking in carbon dioxide and producing oxygen. This went on for aeons.
As the planet got older it cooled because the energy was 'locked up in the decaying plant matter, so the earth's crust hardened and under pressure the decayed plant matter became coal and oil buried beneath the surface.
Ice ages came and went and I understand that these are understood to be related to changes in the earth's axis and also solar changes.
Then came the Industrial Revolution; first coal was mined and burned, then petroleum and gas were discovered and we burned and continue to burn that to produce the energy we have become so dependent on.
Don't forget those school physics lessons ... energy produces heat.
The coal, petroleum and gas are the giant trees and ferns and plants like marestail which had covered the globe, photosynthesising carbon dioxide into oxygen. By burning them we are releasing the carbon dioxide back into the atmosphere and slowly but steadily reproducing the conditions which prevailed back then.
Periods of cooling etc will continue to come and go because of changes in the earth's axis and changes to the sun, but while we continue to release the carbon dioxide back into the atmosphere we are causing the globe to heat back up. Sometimes it will be two steps forward and one back, but the overall direction of the temperature is upwards.
Pretty simplified explanation, but it makes sense to me.