Open a new worksheet, and notice the new Dimensions andMeasures from the added data. We’ll need to graph the reported CO2e emissionsvs Net Generation for each facility. (It would be better to use the powerplantname from EIA rather than the EPA facility name.) Some power plants havemultiple generators listed under the same plant ID and name. So, we might wantto use AVG on the measures rather than SUM. It looks like there’s two distinct trends within the data.Let’s add fuel types and see if we get a clearer picture. Drag AER Fuel TypeCode onto color. For reference, these are the type codes. Let’s exclude everything except Coal, Natural Gas, and Distillate Petroleum by filtering on fuel type. These are the three main fossil fuel power plant types.                           SUN | Solar PV and thermal |                           COL | Coal |                           DFO | Distillate Petroleum (Fuel Oil) |                           GEO | Geothermal |                           HPS | Hydroelectric Pumped Storage |                           HYC | Hydroelectric Conventional |                          MLG | Biogenic Municipal Solid Waste and Landfill Gas |                           NG | Natural Gas |                          NUC | Nuclear |                          OOG | Other Gases |                         ORW | Other Renewables |                           OTH | Other (including nonbiogenic MSW) |                           PC | Petroleum Coke |                           RFO | Residual Petroleum |                         WND | Wind |                         WOC | Waste Coal |                         WOO | Waste Oil |                       WWW | Wood and Wood Waste |
 So in general, natural gas is a cleaner fuel than coal. 6.1. Addtrend lines.We can add trend lines to this chart by clickingAnalysis -> Trend Lines -> Show Trend Lines. Note that hovering over the trend line gives a lot of statistical information.Cool. But why is there a lot of variation between power plants with similar electricity outputs? Could plant efficiency have something to do with it? Onto the next section. | 
