Charging an EV with the electric grid is also very thermally inefficient. Only about 35% of the heat energy used by the grid is converted into electricity, which means 65% is vented into the air, directly warming the atmosphere.  Each kWh produced by coal or petroleum emits between 600 to 1000 grams of CO2.  see: 

     The grid’s distribution losses (including transformer losses and line losses) can be over 10% so thermal efficiency drops to about 31.%. An EV charging system lowers efficiency by another 14%. So overall efficiency is just 27% and each kWh that went into the battery is now responsible for up to 1,300 grams of CO2 being vented into the air.  (Note: Technical losses are normally 22%)  See: 

     Testing by Forbes found that one kWh will move the average EV 4.6 km or 2.9 miles, which on average would be close to 300g/mile.  But, how does that compare to gas-powered vehicles of a similar size?

     A study by Technology Analyst, John Peterson noted that "Readers will be shocked because my conclusion is 180 degrees out of synch with Tesla's sustainability mythology. Frankly, there's simply no reason for investors, politicians, or governments to support vehicle electrification if EVs offer no appreciable environmental benefit."  He further noted that "analysis shows that Tesla's long-range Model 3 has a 24% heavier CO2 footprint (278g/mile) than the Camry Hybrid LE" (211.1/mile). 

     When a Kamtech's RE is installed in a vehicle the size of a Tesla Model 3 it is estimated to consume only two liters of gasoline per 100 km.  Two liters of gasoline produce 4,600 g of CO2 or just 46g/km converted to g/mile you have just 74g/mile.   If Natural gas is used as its fuel then only 40 grams of CO2/km is emitted.   How can a Kamtech-equipped REEV be so clean?