Why is buenos aires the capital of argentina?

It may be the captial because of how it is the largest city in Argentina. (2.8 million) The second largest city, Cordoba, has only 1.3 million. And also Buenos Aires is internationally known.

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.