sentence1: We estimate that reductions in exposure to fine PM and ozone due to the Clear Skies Act will result in over 6,000 fewer deaths in 2010 and nearly 12,000 fewer deaths in 2020, as well as nearly 4,000 fewer cases of chronic bronchitis in 2010 and over 7,000 fewer cases in 2020.
sentence2: It is estimated that the air quality improvements under the Clear Skies Act will lead to 7,000 fewer cases of chronic bronchitis in 2020.