Doni's town was facing a problem of environmental pollution, which he believed was related to the increasing greenhouse effect and the risks of climate change. What did Doni decide to do about this situation?

• He decided to move to a different town.
• He focused on inventing impractical things.
• He decided to take action to save his town.
• He blamed the people for the pollution.

The story states that Doni thought his interest in renewable energy stemmed from his experiments 'with a little help from the wind.' This implies his focus was on which type of renewable energy?

• Solar energy
• Geothermal energy
• Wind energy
• Hydropower

In paragraph 5, it is mentioned that 'Doni and the people were very happy to use the wind energy.' What was a significant benefit of using wind energy for the townspeople?

• It was expensive to install.
• It caused more pollution.
• It was cheap and reduced air pollution.
• It required advanced scientific knowledge.

The sentence 'He spent all of his time working with scientists, learning about new ideas and thinking, and about old problems in new ways' describes Doni's approach to problem-solving.