What is the difference between car seat leather and leather?

What is the difference between car seat leather and genuine leather? The original seat cover can be divided into three different material original seat covers:
1. High-grade car seat cover is made of raw cowhide or pigskin;

2. The environmentally friendly car adopts PU leather (synthetic plastic), which is non-toxic and tasteless. In addition, it decomposes automatically when buried in deep soil; this material is used in cars and taxis used in the Beijing Olympics and the Shanghai World Expo.

3. The PC leather (synthetic plastic) used in general household cars is non-toxic and tasteless. After being discarded, it cannot be automatically decomposed when buried in deep soil, and it is volatile when burned.

Note: The base fabrics of the latter two materials are non-woven fabrics or special chemical fiber fabrics.