How do carelessly thrown plastic bags (polythene bags) affect :
(a) dirty water drains and sewers ?
(b) animals (such as cows) ?
It affects as
(a). If the plastic bags are carelessly it will clog drains and sewers which will cause the growth of bacteria and fungus causing drainage block.
(b). The animals eat up the used polythene bags or plastic wrappers along with the leftover food and vegetable wastes are thrown on garbage. It may lead to the death of stray animals or cows after the consumption by these animals.