A better question is why a company is allowed to effectively lie using fraudulent false advertising in its marketing and brand image about being environmentally conscious and become the largest polluter in the country?

Is Amazon too broke to buy the necessary land to build out wind/solar/battery? I thought a company that name sponsored “Climate Pledge Arena” could afford to pay a little bit extra to care about the climate.

A wind/solar/battery solution is not even really much more expensive than gas power and it’s far less dependent on fluctuating fuel prices.

efficient in money, nothing is said about other metrics

it's quite possible to have more product made, thus more pollution (or less materials consumed, thus less)

but concentration definitely will rise

If I understand correctly, for speed of deployment they're building a less-efficient simple-cycle plant (instead of the typical combined-cycle). Even though it's larger, the efficiency is worse than a typical natural gas plant.

A bigger unit is generally more efficient, but this is a single plant with a bunch of units, and I don't know that the individual units are any bigger than they would be elsewhere.