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It's a very important number. environmental experts claim if global average temperatures warm more than that, it could lead to climate catastrophes. >> like a prediction for parts of the middle east, one day it could be too hot for humans to survive there. the study published says the extreme heat could et set in within a century. a companion study claims temperatures could reach up to 60 degrees celsius. for more, we turn to pedram javaheri who joins us now with more. what parts of the middle east are we talking about? the whole area? >> for a large area, and some of the major cities as well ...

Versus dupage comparison that you were making, if you take a low income boy say born to the family earning beolow the median income, and you imagine that they grew up in baltimore as opposed to dupage county, the western suburbs of chicago, we would expect them to be earning 50% less as a result of growing up in baltimore as a low income boy, whereas only 30% for low income girls. >> part of the reason that you do the studies is to effect change, and advise policy makers and this is something that the lawmakers look at when they look at where the funding should go to and what it should be used...