A collection of research articles explores how tropical ecosystems have borne the brunt of the human impact on the environment. Image credit: Pixabay/Pexels.

A collection of research articles explores how tropical ecosystems have borne the brunt of the human impact on the environment. Image credit: Pixabay/Pexels.

A special episode explores the state of CRISPR use in agriculture. Image credit: Can Stock Photo/molekuul.

A special episode explores the state of CRISPR use in agriculture. Image credit: Can Stock Photo/molekuul.

Rodrigo Cámara-Leret explains the impact of indigenous language extinction on medicinal plant knowledge. Image credit: Pixabay/DEZALB.

Nicolas Taberlet and Nicolas Plihon explore the physical explanation for a fascinating natural phenomenon: the formation of Zen stones on frozen lakes. Image credit: N. Taberlet, N. Plihon. Lab Physique ENS de Lyon and CNRS.

Hessam Azarijafari, Randy Kirchain, and Jeremy Gregory explore how innovations in the concrete industry can reduce greenhouse gas emissions. Image credit: Pexels/Life Of Pix.

Sarah Chambliss discusses racial and ethnic disparities in exposure to air pollutants. Image credit: Pixabay/sueegeneris.

Maggie Wagner and Manuel Kleiner report that the interaction between maize and soil microbes influences hybrid vigor. Image credit: Kayla M. Clouse.

Gaige Kerr discusses racial disparities in atmospheric levels of nitrogen dioxide in the United States.