In this lesson, the focus was on the industrial changes in rural areas of Germany, particularly highlighting the Ruhr area. This region, known for heavy industrialization, hosts numerous factories and manufacturing activities, which have developed over time due to natural resources like rivers that facilitate transportation and power supply. The lesson also covered the historical evolution of industry in the area, noting how industrialization began in the 1930s and 1940s, particularly in armaments, but has faced significant decline in recent years as coal mines and steelworks have closed, leading to job losses and changes in the local economy.