What do the colors on the south african flag mean?

Answergovernment control over all imports and exports;

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.

Ilam  is the most commonly practiced religion