Smog affects lots of things, for starters, it pollutes the air so (if there is enough of it) the air is unsafe to breathe. It also holds hot air inside Earth's atmosphere so it cannot escape into...
their cars can slip of the paths; bad storms can cause them to even die! the earthquake in Haiti washed away their homes and they are very very poor. That's why we are worried about them!
The equator is not impacted by climate change. It is the line marking halfway point between the north and south poles and has no relation to temperature.