The big question addressed in lab, and a description of what you did. video notes - 2020- hottest decade ever, largest number of mega-fires, caused by lots of droughts - fumes having impact on planet - fires are now occuring annualy since earth is warming and droughts are more common - sun is dominant source of energy - carbon dixode peeked then went down then went back up again - plants takeup CO2 from atomospehere during summer, winter decomposition - caused by veggitation in northern hemisphere - plant matter made up more of carbon 12 than carbon 13 - carbon coming from volanos have different ratios Greenhouse effect - image in presentation Earths blenket and light - certain gases in our atmosphere act like a blanket around the earth - light rays coming from the sun contain visble photons (energetic light particles) - abosrbed by earths surface A description of what you learned in Thursday's lecture. Why d...