Question

(a) state the cause and effect of depletion of ozen
(b) state four factors involved in crop variety improvement
(c) what is commercial unit of electrical energy.
(d) nmae two exotic breeds 1 cow
2 poultry

Answer 1

(a) depletion of ozone is mainly due to CFC's or chloro fluro carbons these CFC reach the ozone layer and displace oxygen from ozone. hence depleting them
 sorry I do not the other questions u have asked