What Would happen if the earth went into Nuclear Warfare or known as WW3 Would Humanity be able to live on?

How would it affect the earth?

Would we all die?

And if you didn't die or get insinarated after the blast or throw away and killed by the shockwave where would be the safest place to go to hide from radiation?

Question 1: There is a possibility that some parts of the government would be able to live on.

Question 2: It would cause extreme amounts of damage to Earth and all of the beings on it. It could also destroy Earth's atmosphere.

Question 3: Most likely, but if not all then the majority of people would die and the surviving people would be exposed to radiation.

Last Question: You probably shouldn't go into a basement because it is still warfare. A bunker could be discoverable and blown to pieces, but isn't a bad option. In a bunker, you could survive if it was protected from the warfare around it.

Explanation:

Using knowledge of past warfare and the effects to humanity based on radiation, I then made situations to answer your question. If this is not the right answer you are looking for please tell me.