Assertion: damnation | /r/HasProperty | made over the course of three years
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text: Made over the course of three years, “DamNation” argues contrary to popular belief that hydroelectric power isn’t environmentally clean or efficient, that reservoirs formed by dams release vast amounts of harmful methane (owing to decomposing organic material underwater) and that costly fish ladders and hatcheries scarcely mitigate the damage dams cause to spawning wild salmon.