Why Water Matters
Water is one of the most important natural resources on Earth. We drink it, cook with it, wash with it, and use it to grow crops and run factories. Although oceans cover most of the planet, that water is salty. Only a small part of the world's water is fresh water that people can use, so we must use it wisely.
Key idea
The Sun powers the water cycle: water evaporates from seas and rivers, forms clouds, falls as rain, and flows back to the sea. This cycle keeps refilling our fresh-water supply.
Sources of Fresh Water
In Malaysia and around the world, fresh water comes from several sources:
- Rivers and lakes – surface water collected and cleaned at treatment plants.
- Rain – heavy equatorial rainfall fills rivers and dams.
- Dams and reservoirs – store river water for towns and for hydroelectric power.
- Groundwater – water stored underground in rocks, reached by wells and tube-wells.
Malaysia's wet equatorial climate gives it plenty of rain all year, so rivers such as the Pahang and Perak are important sources. Water is treated to make it clean and safe before it is piped to homes.
Using and Protecting Water
Water is used at home, in farming (irrigation of rice fields), and in industry. Even in a rainy country, water can become scarce during dry spells or when rivers are polluted by rubbish, factory waste or sewage.
Example
During a long dry spell, dam levels in Selangor can fall so low that water rationing is needed, showing that even wet countries must save water.
Remember
- Only a small share of Earth's water is usable fresh water.
- Main sources: rivers, rain, dams and groundwater.
- Save water and stop pollution to protect this resource.