Which type of organic molecule is an amino acid? a. building block of carbohydrates b. building block of proteins c. building block of nucleic acids d. building block of lipids

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

b is the correct answer

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