Final answer:
Plastic can be melted, incinerated, or recycled, but each method has its own environmental impact. Burning or incinerating plastic releases harmful gases, while recycling helps reduce waste and conserve resources.
Step-by-step explanation:
Plastic can be melted, incinerated, or recycled, but each method has its own environmental impact. When plastic is burned or incinerated, it releases harmful gases, including CO2 and carcinogens, into the air. This contributes to air pollution and increases smog.
On the other hand, recycling plastic can help reduce waste and conserve resources. However, the recycling process may still emit some gases, depending on the specific method used. It is important for factories and recycling facilities to implement exhaust devices and proper air pollution control measures to minimize the release of harmful gases.