Answers

2015-09-05T06:18:00+05:30

Bacteria causing black death .

antibiotics resistant infection lead to 23,000 death a year.

bacteria viruses and parasites cause 1.5 million cancer death .

0
2015-09-05T11:21:59+05:30
using of pestcides in fields kill useful bacteria and fungi which fertile the soil. anthropogenic global warming also causes death of useful bacteria.
0