The Paris Agreement is an international plan to address climate change.
An invasive species is a type of animal, plant, fungus or any other living thing that has arrived in a new environment and can harm other species there.
In April 2010, the Deepwater Horizon oil rig in the Gulf of Mexico exploded, killing 11 people. Two days later the rig capsized, and the pipe below began spewing oil.
Glyphosate is the most commonly used herbicide chemical in the world, sprayed everywhere from farms to backyards.