Moored off a Manhattan pier for New York’s annual Climate Week is one of the world’s first ammonia-powered vessels — a green flagship for an Australian tycoon’s drive to decarbonize his mining empire.

Even as President Donald Trump’s second term has triggered environmental backtracking among many corporations, iron ore giant Fortescue — founded by Andrew “Twiggy” Forrest — is investing billions to clean up its dirty operations.

“We’re a huge polluter right now,” he told AFP in an interview aboard the Green Pioneer, a 75-meter former oil-rig supply ship given a swish makeover. “But we’re changing so fast, and within five years, we’ll stop burning fossil fuels.”

The Green Pioneer is meant to be the first in a fleet of ammonia-powered ships.

Ammonia contains what Forrest calls the “miracl

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