This isn't a novice-level entry into the world of biochar and its potential role in helping to reverse the global warming we've caused and the two presentations are quite bland by most modern standards, but I really like this graphic that Nikolas Hagermann shared to help explain pyrolysis. https://youtu.be/WHIVyx9-HlY?si=rKcazC7ZgMiMpKQX
I also quite liked that he showed the snowboard built using biochar that won a medal for its rider