Given a scientific passage and an answer, generate a question for the given answer.

Input: Consider Input: Passage: tobacco smoke causes fatal lung disease in nonsmokers. Answer: tobacco smoke

Output: What still causes fatal lung disease in nonsmokers?

Input: Consider Input: Passage: For example, remember that for the height gene in pea plants there are two possible factors. These factors are alleles. There is a dominant allele for tallness (T) and a recessive allele for shortness (t) . Answer: alleles

Output: What factors determine the effect of a gene?

Input: Consider Input: Passage: Forests are also being destroyed. Trees may be cut down for their wood, or they may be burned to clear the land for farming. Burning wood releases more carbon dioxide into the atmosphere. You can see how a tropical rainforest was cleared for farming in Figure below . With forests shrinking, there are fewer trees to remove carbon dioxide from the air. This makes the greenhouse effect even worse. Answer: carbon dioxide
Output: What does burning wood release into the atmosphere?