Should disel and gasoline engines complaint with co2 emissions standards be banned? ? can this statement be answered by science?

Yes.  Emissions at the getgo are not that harmful.  However, when they build up, they can become lethal.  This can be declaired by science in the sense that scientists have done research and done it with monkeys who have relatable body parts with humans.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.