Smoke-choked air that fills their lungs, floods that threaten their homes and heat strokes that strike without warning: a group of young Americans testified Tuesday that President Donald Trump's fossil-fuel push is trampling their inalienable rights.

Lighthiser v Trump is emblematic of a growing global trend of legal action as a tool to push action on planetary warming amid political inertia or outright hostility.

At issue are three executive orders that "unleash" fossil fuel development and curb the electric vehicle market, invoke emergency powers to accelerate drilling, and designate coal a "mineral," granting it priority status for extraction.

They are also contesting the government's actions undermining federal climate science.

A two-day hearing opened in a federal courtroom in Mis

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