you have a bad bearing
sometimes
its nothing bad. Depends on the sound. If it is a clicking or thunk it is probably the CV joint in the axle. It will start when you are turning and then as it gets worse as you are going straight.
If it is worse on cornering probably a worn cv joint
Yes if the pollution gets worse and worse
Inspect the rubber boot that covers the joint. If it is torn, and there is dirt and grit up inside, your cv joint is about to fail. You'll know it is failing when it starts clicking. It will click each time the wheel turns. The clicking gets worse as you turn the wheel. The clicking gets worse and louder and turns into a 'thunk' right before it self destructs.
A clicking noise usually worse on hard cornerning
Shake the audio cables and if the clicking get worse you have bad cables or connectors.
Clicking means metal on metal and no oil in between. Check your oil, oil and filter changed? Don't drive it if it gets worse - there is a glog somewhere - or it is too late already.
Probably, every year the weather gets worse and worse
No, it has no effect
Honesty No where and it is only going to get worse.
yes. be afraid. be very afraid.