And the answer is, of course it's different,

答案当然是不同的
it's radically different.

而且是大不相同
And I'll demonstrate in a few weeks why that is.

几个星期后我会告诉你们为什么会这样
So EPA has this image of pollution being quite uniform

所以环保署得知的污染状况
across a state or across a region,

整个州整个地区都差不多
whereas the pollution that you inhale on a daily basis

但是你每天都在吸入污染物
coming from secondhand cigarette smoke or firsthand cigarette smoke,

从二手烟或一手烟
coming from vehicle emissions, coming from power plant emissions,

到汽车尾气还有发电厂排放的烟尘
power plants in Ohio.

俄亥俄州的发电厂
Generally it takes about two weeks for particles released to the air

一般来说排放到空气中的粒子约两个星期
in Europe if they're very fine to make it into the stratosphere

就能进入平流层如果它们非常微小
and to go all the way around the world and then come back

然后环游世界然后回到这里