I think the poison he mentions is pollution rather than drugs. To me, he's saying there's nothing different between Brooklyn and London becuase it's all just concrete buildings and polution, and it shouldn't be this way.
Maybe he 'can't see so good' because of smog, or tall buildings etc.
It's 'Nothing is changed' not 'Nothing is safe'.
I think the poison he mentions is pollution rather than drugs. To me, he's saying there's nothing different between Brooklyn and London becuase it's all just concrete buildings and polution, and it shouldn't be this way.
Maybe he 'can't see so good' because of smog, or tall buildings etc.