Question

in older days, peole did not use filtet, but still the water was safe for drinking. find the reason ​

Answer 1

$\huge \underline \bold{answer}$

In older days, the level of water pollution was low. The water in the rivers and lakes was pure and free of harmful chemicals, and hence was used for drinking.

Today the level of water pollution has increased rapidly making water not suitable for drinking. The dumping of garbage, release of toxic chemicals in water bodies is making water polluted.

Answer 2

In older days, the level of water pollution was low. The water in the rivers and lakes was pure and free of harmful chemicals, and hence was used for drinking.