Final answer:
The Clean Air Act saved approximately 100,000 lives in 1990, resulting in significant health benefits and a value of $110 billion in 2010.
Step-by-step explanation:
The Clean Air Act saved approximately 100,000 lives in 1990. According to a study by the Environmental Protection Agency (EPA), the health benefits from cleaner air resulted in a significant reduction in illness and premature death. The estimated value of avoiding these health impacts was about $110 billion in 2010.