it is a scam
It is not a scam but reality. Planet Earth is warming up artificially. Your misstake is looking only at the volume of CO2 emission forgetting that CO2 is not the only greenhouse gas. Read upon the amount of methane emission.
Methane (CH4) is the second most prevalent greenhouse gas emitted in the United States from human activities. In 2013, CH4 accounted for about 10% of all U.S. greenhouse gas emissions from human activities. Methane is emitted by natural sources such as wetlands, as well as human activities such as leakage from natural gas systems and the raising of livestock. Natural processes in soil and chemical reactions in the atmosphere help remove CH4 from the atmosphere. Methane's lifetime in the atmosphere is much shorter than carbon dioxide (CO2), but CH4 is more efficient at trapping radiation than CO2.Cropped 100+ words
Additionally methane initially reacts with ozone in a 'chain' reaction that ultimately produces CO2 and water vapour(Water vapour is a greenhouse gas too). Reaction looks like this: (3)CH4 + (4)O3 = (3)CO2 + (6)H2O. So it's another extra volume of greenhouse gases in the atmosphere as a result of anthropomorphic activity. The emission of every single gas able to contribute to climate change has got an extra kick because of us. Historically(averaging over the past 400,000 years) CO2 is around 240ppmv, and now it is around 385ppmv(60% higher). Methane is historically(over past 1,000 years) around 700ppb and now at 1700ppb(140% higher). The % for CO2 is smaller if we start from the warm period average of around 280ppmv.
The emission of methane has slowed down or even got reduced since 1998 because of unclear reasons.
Anyway... Discussion about Global Warming shouldn't be if it's real but how much of it is our fault.