According to the dialogue, which of the following is true? a. Industry is against the use of alternative energy. b. Technological progress is not good. c. People are starting to care more about the environment. d. Most people are more aware of alternative energy sources.

Based on the provided dialogue, the true statement is:

c. People are starting to care more about the environment.

Explanation: The dialogue mentions that since the 1980s, people have become more aware of the environment, and recycling has grown out of this awareness. This indicates that people are starting to care more about the environment.