The Atlantic basin is getting larger with time because it is spreading from the mid-Altantic ridge. The edges of the basin are not subducting like, for example, the Pacific plate.
The Amazon Basin
The west side is the larger part.
The west side is the larger part.
West of the river
West of the river
West of the river
The Amazon Basin is the part of South America drained by the Amazon River and its tributaries. The basin is located mainly (40%) in Brazil, but also stretches into Peru and several other countries.
There are many different kinds of drainage basin on the surface of the earth.
east
west
Because the population keeps getting larger.
Because of the much larger drainage basin.