What's that Smell??

I do not envy roofers. Especially the ones who install the flat roofs with tar. The roof of the building next to our office is being replaced. The smell is horrid. I can only imagine what it's like to actually work up there, all day long, breathing in the chemicals. There's actually guys with buckets and mops, like in the Shawshank Redemption, spreading the tar on the roof.