Question

1. what environmental challenges were caused by the operations of the union stockyards?

Explanation:

The Union Stockyards had various environmental impacts. There was waste - disposal issues from animal by - products, water pollution from runoff containing animal waste and chemicals, and air pollution from the stench and emissions related to meat - packing and animal handling operations.

Answer:

Waste - disposal issues, water pollution from runoff, air pollution from stench and emissions.