1, "pork belly", "edible oil", "fungus such as auricularia auricula and tremella" and "vegetables"

2. Make a comparison. Comparing wild mushrooms with artificially cultivated mushrooms, the pollution degree of wild mushrooms is written, which also tells us that edible mushrooms should choose artificially cultivated mushrooms and the safety of mushroom food is written.

3. There is no contradiction. Because the fifth paragraph says that fungi are generally pollution-free, and the sixth paragraph says that wild fungi are pollution-free, you don't have to worry about the safety of various fungi if you eat a small amount.

3, which means "eating more green vegetables can fight smog." My attitude is: I agree. Because chlorophyll and carotene in vegetables can help eliminate deadly toxins and resist the harm of smog.

4. no. It only reduces the degree of smog to a certain extent.

Hope to adopt! Thank you.