Prehistoric pollution

[elephant]

Christophe, your doubt about nickel is quite justified: it is an allergen of choice!

[Exnihiloest]

...
For me the best definition is: pollution is the imbalance of an (eco) system.
...

Do you mean that it would have been desirable for the ecosystem of dinosaurs to remain in balance?

It is precisely the imbalance of their ecosystem that has allowed mammals to emerge, and thus men to appear.

[dede2002]

In the context of the time, that is to say in the skin of a dinosaur, it would have been desirable.

In our case, we may wonder which species will benefit from the imbalance of our ecosystem ...

[Christophe]

Do you mean that it would have been desirable for the ecosystem of dinosaurs to remain in balance?

It is precisely the imbalance of their ecosystem that has allowed mammals to emerge, and thus men to appear.

I did not say that ... but actually mass extinctions are a factor of evolution ... or not!

What kind of species will dominate the Earth in 1 million year? Nobody can say it would be speculation, on the other hand there is very likely that it is no longer the man ... as the under dede!

[Exnihiloest]

...
In our case, we may wonder which species will benefit from the imbalance of our ecosystem ...

See the other two sons on transhumanism.

The point was only to say that "balance", which could also be called "stagnation", is an aspiration which has no legitimacy.
Life itself is an example of imbalance (thermodynamically, we can see it as a stationary state of non-equilibrium, see Iliya Prigogine).