Retaw

I can bring power and poverty.

I can transport and I can be transported.

I can be white or brown, even blue or green.

I am everywhere and I am wanted.

I am odourless, but I can stink too.

I have been on the top of mountains.

And I will always be on the bottom of the sea.

I have killed a lot of people.

I have saved a lot of people.

Some of them are smiling when I drop in.

Some of them are crying.

I am what you need most.

I will always be with you.

Always!

I am in your body.