Water pollution:

As Malaysia is fast becoming an industrial country, many of her rivers have become polluted due to the many wastes that have been poured out into her rivers. Such as the paper making industry, it requires chemicals, often poisonous in its production. The rivers are used as an outlet for the chemicals to drain away, in turn harming the waters and the lives that revolve around them.
There are many ethnic aboriginal groups that still exist in Malaysia and the people depend on the rivers and streams to survive. They depend on the river for food, water supply for drinking, bathing and for their crops. the river happens to be the main centre of their livelihood and without the rivers the whole tribes cannot survive as their ancestors had done generations before them, all of them depending on the rivers.
The rivers have become a tourist attraction and this has prompted the construction of hotels and resorts around the area. As a result, many of the forests surrounding the river areas have been chopped down. The surrounding soil have no roots to hold on to and soon erode when the rains come. The soil runs into the rivers and soon the rivers become murky and shut out all the sunlight from reaching the aquatic life in the rivers and streams. This causes them to die.
A good example is the construction of a new golf course near the waterfall at tourist attraction Fraser’s Hill in the state of Pahang, causing it to become extremely murky and dirty due to the silt and sand that comes from the construction. The waterfall which has been the centrepoint of the hill has now lost all its attraction just because of the overwhelming need to attract more tourists to the place by building more facilities.