3 ms·>reminder of human presence. Still not as bad as a plastic bottle on the ground.by j3097736 9y ago>reminder of human presence. Still not as bad as a plastic bottle on the ground.lkbm 9y agoI think a better comparison would be smog and acid rain. Coal isn't giving us the plastic bottles, but it does negatively impact us in much subtler yet worse ways than a visual reminder.zhte415 9y agoYou don't inhale plastic bottles.mavhc 9y agoUnless you're a fish