There's always a little bit of this everywhere. This is a...
There's always a little bit of this everywhere. This is a product of combustion, so there's some in the air. You've got to develop your lab so that you have ultra-clean techniques.
There's always a little bit of this everywhere. This is a product of combustion, so there's some in the air. You've got to develop your lab so that you have ultra-clean techniques.