Black Triangle, engineering homework help

Based on the (Black Triangle) case, I want answers for the flowing questions: 1. Provide three reasons why the Most Basin in the “Black Triangle” became so toxic. Discuss the political, economic, and cultural reasons why this occurred. 2. Provide three reasons why the Most Basin is on its way to recovery. Discuss the political, economic, and cultural reasons why this is occurring. 3. Discuss what this case study (Black Triangle) teaches us about environmental destruction and environmental recovery. 4. What are two special challenges that lay ahead for the Most Basin in the Czech Republic for recovery to continue and become permanent. I also need references for the answers. Number of pages should not be less than 2 pages.