“A broad range of global phenomena created predominantly by burning fossil fuels, which add heat-trapping gases to Earth’s atmosphere. These phenomena include the increased temperature trends described by global warming, but also encompass changes such as sea-level rise; ice mass loss in Greenland, Antarctica, the Arctic and mountain glaciers worldwide; shifts in flower/plant blooming; and extreme weather events.”
"Ocean acidification, the worldwide reduction in the pH of seawater as a consequence of the absorption of large amounts of carbon dioxide (CO2) by the oceans. Ocean acidification is largely the result of loading Earth’satmosphere with large quantities of CO2, produced by vehicles and industrial and agricultural processes. Marine scientists are concerned that the process of ocean acidification constitutes a threat to sea life and to the cultures that depend on the ocean for their food and livelihood."
"Pollution is the introduction of harmful materials into the environment. These harmful materials are called pollutants. Pollutants can be natural, such as volcanic ash. They can also be created by human activity, such as trash or runoff produced by factories. Pollutants damage the quality of air, water, and land. Many things that are useful to people produce pollution. Cars spew pollutants from their exhaust pipes. Burning coal to create electricity pollutes the air. Industries and homes generate garbage and sewage that can pollute the land and water. Pesticides—chemical poisons used to kill weeds and insects—seep into waterways and harm wildlife."
"A species can be an animal, a tree, a coral, a fungus, an insect, or any number of other life forms on this planet. Altogether we call this range of life ‘biodiversity. Experts perform a rigorous assessment of a given species to categorize it, asking a host of crucial questions. Is the species’ habitat shrinking? If so, how quickly? How many individuals are there? Is that number dropping? How drastically?
They look at what threats the species faces, too, and any actions underway to protect it.
While all these categories are important in evaluating life on Earth, the term ‘endangered’ refers specifically to species listed as Critically Endangered, Endangered, and Vulnerable.
A species considered to be facing an extremely high risk of extinction in the wild.
A species considered to be facing a very high risk of extinction in the wild.
A species considered to be facing a high risk of extinction in the wild.