Question

1. Sahil out some water from a nearby lake. He wants to purify it to be sure that it is free germs. Which method he can use foe purification?
2. If the Earth has so much water, why do we still struggle for potable water ( water that is fit for drinking) ?​

Answer 1

1. He can boil the water for purification.
2. Earth has an abundance of water, but most of it is salt water.