1.
(1) important
(2)machines
(3) transport
(4) pollution
(5) working
(6) for
2.
(1) It is a beautiful flying car
(2) It takes AcroMobil only about 15 minutes to change from a car to a plane
(3) It can use any airport in the world, but can also take off and land using any grass strip and paved surface.
(4) yes, it can.