21 trains running late due to low visibility in the Northern Railway region

Oxygen concentration is an important measure of water quality because fish and other aquatic organisms require dissolved oxygen to breathe, according to Wei Zhi, assistant research professor of civil and environmental engineering and first author of the study, recently published in Nature Water.

Certain pesticides, particularly a class called neonicotinoids, are known to impact bees and other important insects, and are thought to be contributing to population declines. However, bees' reported responses to this threat across the world often seem to vary, suggesting other interacting factors are at play.

Dramatic changes to forests, and other habitats that store carbon in plants and soils, are becoming more likely in some regions across Earth, with less carbon consistently absorbed by the 'land carbon sink' provided by trees, soil and plants, according to scientists writing in Nature

According to research conducted by the Geological Society of America, a past climatic change is being linked to the extinction of an ancient variety of whales.

Mountain landscapes all over the world are at risk of becoming more dangerous to populations surrounding them as a result of climate change, while their faster development may bring additional environmental risks to neighbouring areas.