The initial thoughts would be contamination but then again depends where in the world the oil silo’s are as environmental laws may actually force things beyond what most people would assume.
This idea by PinkCloud.DK is a clever one where it sees new sustainable buildings and homes developed out of portable and already well sealed structures.
Never seen one before? That’s what I was thinking but at least 50,000 of these structures are in existence.
May not seem practical today but may be tomorrow, the important thing is people are thinking out of the box with recycling and practical usage of obsolete buildings.