In order to save energy and protect the environment, patrol law enforcement vehicles and tour buses in many tourist attractions have replaced fuel vehicles with electric vehicles. Technical Parameters

In order to save energy and protect the environment, patrol law enforcement vehicles and tour buses in many tourist attractions have replaced fuel vehicles with electric vehicles. Technical Parameters of an Electric sightseeing bus A, everyone's gravity G=mg=6kg×1N/kg=6N, so A is wrong;

B, the pressure on the ground when the tour bus is fully loaded F=G =(m bus +m people) g = (18kg+12× 6kg )× 1n/kg = 1.8× 14n,

the pressure on the horizontal road when the tour bus is fully loaded; P=FS=1.8×14N.1m2=1.8×15Pa, so B is wrong;

C, because the electric vehicle runs at a constant speed, according to the two-force balance condition, so F=f=2×13N, so c is wrong;

D. From the perspective of environmental protection, electric vehicles have the following advantages, that is, they can reduce exhaust pollution, thermal pollution and noise pollution, so D is correct.

Therefore, D is selected.