Plants make their own food using sunlight, which makes them .

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.

1. they vary with a higher number because boiling is way hotter than melting

a corroding iron, if that's one of your choices