In the 1930s, terrifying duststorms began to blow in the Great Southern plains of America. This black blizzards rolled in, very often 7000 to 8000 feet high.
It had following adverse effects in America
(i) As the skies darkened and the dust swept in, people were blinded and choked.
(ii) Cattles were suffocated to death, their lungs caked with dust and mud.
(iii) Terrible storms buried fences with sand, covered fields and coated the surfaces of rivers till the fish died.
(iv) Dead bodies of animals and birds were strewn all over the area further making it polluted.
(v) The tractors and machines were clogged with dust, damaged beyond repair.