South-facing aerial view of Cleveland Works steel mill on both banks of the Cuyahoga River. At middle left is one of two blast oxygen furnaces. [Credit: Nickknack00, CC BY-SA 4.0, via Wikimedia Commons.]
by Kollibri terre Sonnenblume
South-facing aerial view of Cleveland Works steel mill on both banks of the Cuyahoga River. At middle left is one of two blast oxygen furnaces. [Credit: Nickknack00, CC BY-SA 4.0, via Wikimedia Commons.]