Why have many experts decided that the Aral Sea might be beyond saving? What does this situation say about the effects that human activity can have on the planet?

Because  It lost most of its surface and there is a really small percent of optimistic opinions that something could be done to prevent it from completely drying out. The effects that human beings have on the environment is referred to as the anthropogenic effect. Humans are completely reliant on the well being of their environment. The anthropogenic effect refers to the impact of human activity on the environment. Anthropogenic impact includes the impact on biodiversity and biophysical resources.