Just do some research into the trends, it's been enough to convince me: nuisance flooding along the east coast, number of regional summer days in the 90s, sea levels have been rising but the rate is now increasing, satellite imagery of the antarctic, recession of glaciers, and then notice how all these trends correlate with the increase of atmospheric CO2 since the industrial revolution. Rather than the headlining global trends, I think it's more impactful to see how climate change affects different regions.