Used as a popular perfume fixative since ancient times, musk is an odorous substance obtained from a gland of the male musk deer. Its strong odor comes from the organic compound muscone. Musklike substances are also obtained from the muskrat and the civet, and even some plants yield oils that resemble musk. Since musk deer are often killed to extract the gland, ethical concerns—as well as economic ones—have led to the production of synthetic musk. Why has this also come under scrutiny recently? Discuss