The amount of nitrogen fertilizer needed to maximize the profitability of corn production in the Midwest has been increasing ...

So why do so many life-forms breathe oxygen? There are probably thousands of kinds of metabolisms, or chemical processes that ...

Alabama first used nitrogen gas to put Kenneth Eugene Smith to death last year, marking the first time a new method had been used in the U.S. since lethal injection was introduced in 1982.

ANGOLA, La. (AP) — Louisiana used nitrogen gas to put a man to death Tuesday evening for a killing decades ago, marking the first time the state has used the method as it resumed executions ...

(The Promise of Justice Initiative via AP) This photo provided by The Promise of Justice Initiative shows the nitrogen gas mask in the new execution chamber at the Louisiana State Penitentiary.

(AP) — Hours before a Louisiana man is scheduled to be put to death Tuesday evening, his attorneys were hoping for a last-minute court ruling to halt the state’s first execution by nitrogen gas.

HOUSTON (AP) — Louisiana is set this week to execute a man by nitrogen gas, the first execution in the state in 15 years. Jessie Hoffman Jr., 46, is scheduled to die on Tuesday in Louisiana.

BATON ROUGE, La. (AP) — Louisiana’s first execution using nitrogen gas is set to move forward as planned next week after a federal appeals court on Friday vacated a preliminary injunction ...