Statement 1: Plastics do not get decomposed by natural processes.
Statement 2: Use of Plastic is becoming a matter of concern these days.
Which of the following statements are true?
1. Plastics do not corrode easily.
2. Plastic objects are not economical as compared to ones made of metal.
3. Plastics can be repeatedly remoulded.
4. Plastics act as thermal insulators upon heating.