Is cf more prevalent in some populations verse others?

Cystic fibrosis (CF) affects both males and females and people from all racial and ethnic groups. However, the disease is most common among Caucasians of Northern European descent.

CF also is common among Latinos and American Indians, especially the Pueblo and Zuni. The disease is less common among African Americans and Asian Americans.

chemical because it warmed up which involves temperature and it bubbled which includes changing

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the answer is:

carbon dioxide