What are some important ideas to share with people who don’t know very much about climate change?

You could present the percentages of carbon emissions by country, currently China is leading the world in carbon emissions

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen