Todays Reflection

Today I learned that the C02 (carbon dioxide) is rising really high because of all the things that the human population is doing to the earth. Because of this learning I will try not to use the car too much and try to bike, scooter or rollerblade to school more. What I don't understand is how they got all of these figures because when I find out I would like to do something like that but for Animal Extinction. My next step is to find out how they did the graph and do one of my own.