Looks familiar? That's because this is taken from the Star.
The idea of using mud balls to save our rivers seems fun and easy so I searched the web to find out how to make them.
(PS. TARC had a mud ball making session during the SOS Earth event but I did not bother to see how to make them at the time)
What I found was that this type of thing is still relatively new as there is not even a wikipedia entry on it yet.
Here is the best thing I found about the mud ball. The main content is in Bahasa but scroll down and you will see the English version on the lower right side.