It does lower tailpipe emissions...I'll grant you that.
But then when you crash into the car or truck in front of you, your car leaks out all sorts of coolant and oil which leaks into the ground and into the water supply. One quart of oil renders 250,000 gallons of water undrinkable.
And I once got hit in the head by a chunk of truck tire while riding my motorcycle. Fortunately, I was wearing a helmet. I get anxiety attacks when someone else is driving and they follow a truck too closely.
But then when you crash into the car or truck in front of you, your car leaks out all sorts of coolant and oil which leaks into the ground and into the water supply. One quart of oil renders 250,000 gallons of water undrinkable.
And I once got hit in the head by a chunk of truck tire while riding my motorcycle. Fortunately, I was wearing a helmet. I get anxiety attacks when someone else is driving and they follow a truck too closely.