Why must you avoid contamination of the peat by either younger living plant roots or older dead carbon such as limestone or oil spills

Answerequatorial guinea,gabon, and western sahara;

The zhou dynasty (1046-256 bce) was the longest-lasting of china's dynasties. it followed the shang dynasty (c. 1600-1046 bce) and it finished when the army of the state of qin captured the city of chengzhou in 256 bce.