"Reduced to a string of stagnant mustard-coloured pools, fouled in places with pesticide runoff and stinking with the rotting carcasses of cattle and fish, the Darling River is running dry."
This river runs dry regularly and has even before the industrial revolution. Guess what happens when rivers run dry? You get stagnant mustard colored pools. The sentence is trying to pull on emotional heart strings with nonsense. You know what else you find naturally in dried up rivers? Dead fish and animals. You know what you find in every body of water around the world today? Pesticides from farm runoff. Does it matter? Sometimes.
In short, just untrustworthy nonsense. I personally am concerned about my impact on the environment, but I consistently vote against collective action because articles like this make me really afraid of how crazy people are and what nonsense they'll believe.