involved. Energy efficiency of the vehicle, as of 2020 the first isothermal prototype reaches 74%, which is similar to the 73-90% of electric vehicles using lithium-ion. Energy density compared to lithium-ion, Isothermal compressed air energy storage ICAES energy density can be at least 2.7Mj/kg or 3.6Mj/m3, 4 times of lithium-ion batteries, which can be improved with high pressure vessels and heat exchanger systems. Resources, compressed air technology can be adapted to renewable energy and circular industry with biobased or recycled composites and so compared to electric vehicles they can be exempt from finite mineral resources or toxic processes used in battery and electric motor manufacturing and also from the electric grid use. Structural weight, the low weight of composite pressure vessels relative to lithium-ion battery and also compared to steel tanks (70% lighter), which that can be reduced by using the tanks as vehicle chassis structure with appropriate impact isolation, also the low weight of wheel hub motor rotary engines. Refilling is possible in almost any place or with onboard equipment, because the only thing necessary is wind, solar power or river, tidal, wave hydropower to move an air compressor, hydraulic pump or stirling engine. Energy synergy with the available pneumatic energy, so all vehicle mechatronics systems can be powered by small air motors, and also the vehicle can use active pneumatic suspension, pneumatic steering or pneumatic shock absorption bumpers, also there can be provided air conditioning or climate control with the using the low temperature created during air expansion. Energy recovery systems with regenerative suspension and Regenerative braking producing low pressure compressed air to be stored in an additional pressure vessel. Low noise of pistonless rotary engines while using compressed air, which can also being soundproofed because the low temperature in which it works. Zero fire hazard, which makes it one of the few transportation systems that cannot produce spontaneous or after-collision fire or explosions like in the case of petrol, ethanol, hydrogen and also battery vehicles. Disadvantages Energy density of compressed air compared to liquid nitrogen or hydrogen. Energy efficiency of compressed air engine compared to micro gas turbine with adequate soundproofing that can be used in hybrid gas turbine-electric motor vehicles with a mixture of compressed air, liquid nitrogen or hydrogen (previous gas turbine powered vehicles have used a setup for speed, rather than efficiency consisting in a large noise gas turbines connected to the transmission) since