Harmful Effects of Physical and Chemical Changes

Too much evaporation means a lot of water is disappearing from where it should be, like from lakes, rivers or even the soil.

Too much evaporation

Glaciers are huge masses of ice that are very important because they store a lot of fresh water. When they melt, they turn into water, which flows into rivers and oceans.

Melting of glaciers

Chemical changes can release harmful gases into the air, like when cars burn fuel or factories produce smoke.

Air Pollution

Chemical changes can also happen in water, like when factories dump waste into rivers or when fertilizers from farms wash into lakes.

Water contamination