Bull-hooey.
If you're genuinely interested you only have to understand the difference between climate and weather, the time scales involved (decades, not years), the limitations of models vis-a-vis spot-predictions, and wrap your head around the nuance between "change" and "rate of change" (ie speed vs acceleration).
That is not hard, but 99% of "skeptics" can't be bothered...
If you're mentally flexible enough to get that the problem isn't that pendulums swing, but that a fast swinging pendulum could be Very Bad for our civilization, climate change rests on three straightforward principles and observations:
1) The absorption spectrum of CO2 and other greenhouse gasses: test-able with an aquarium and a UV light
2) That aggregate 24/7 human industrial activity (ie all: cars, boats, planes, construction, smelting, BTC mining, etc), is somehow increasing greenhouse gasses: this is tested by checking the air, if seeing smog clouds or logic isn't proof enough
3) That Venus exists, our telescopes are not lying, and we don't want to take vacations there
Of the 8 planets in this solar system, 1 of them has had its climate go into overdrive and now resembles biblical Hell. Human activity will never push things that far, but we'd talking about the end of mankind well before that point...
Climate change is not impenetrable to laymen. Climate change has been on the end of a 50 year FUD campaign meant to confuse the issue so that laymen only hear the arguing. Totally coincidental: oil company marketing triangulation has pointed out for years that they don't have to convince anyone on climate change, they just have to extend the debate past the point of action. It worked.