The US military uses a highly polluting method (burn pits) to dispose of most kinds of inconvenient waste in deployment bases.

It causes avoidable injury to US solders, and also to the local civilians. But it's cheap for the Pentagon, supposing it doesn't bear the cost of treating those injuries. Now it will have to pay to treat the US veterans, but not the local civilians.

Don't forget about the diseases caused to both US soldiers and local civilians by Depleted Uranium.