Levels of carbon dioxide — the most abundant planet-warming gas in the air — jumped up by a record amount in 2024.

A Southwest Research Institute-led study modeled the chemistry of TOI-270 d, an exoplanet between Earth and Neptune in size, ...

Even though it is one of the most abundant elements (predominately in the form of nitrogen gas (N 2) in the Earth’s atmosphere), plants can only utilize reduced forms of this element.

Although nitrogen is very abundant in the atmosphere as dinitrogen gas (N 2), it is largely inaccessible in this form to most organisms, making nitrogen a scarce resource and often limiting ...