Captured by Aliens!!

I am in trouble because the aliens wants me to tell them all about Earth.What should I say to them?Oh no, I am captured by Aliens! Please help me!

I told them that the aliens should not come to Earth because the people will kill them as they look scary and  creepy.

There  is nothing good for the Aliens on Earth.
They should not come to Earth because the food is different than their food.The water is dirty and it is not safe for drinking.The sea is also dirty and  its not good for them to swim because they don't know how to swim.