1.The external factor like chemical agent, the cosmetics, the zootoxin, the fish and shrimp, the pollen, the dust, the solarization, scratch with the finger grasp and so on.
1.For example, the state of Chhattisgarh in India has solarized over 900 community health centers and pledged to attain 100 percent solarization to provide energy access, thus anchoring the resilience of the community and protecting the most vulnerable.