The concentration of carbon dioxide in the atmosphere hit 415.39 parts per million (ppm) over the weekend — the highest level seen in some 3 million years, before humans existed, according to scientists at the Mauna Loa Observatory in Hawaii.

Realistic estimates show that global warming can only be kept below 1.5 or 2 degrees Celsius if carbon dioxide is actively removed from the atmosphere.

The most affordable, efficient way to harness the cleanest, most abundant renewable energy source in the world is one step closer to reality.

Regular coffee drinkers can sniff out even tiny amounts of coffee and are faster at recognising the aroma, compared to non-coffee drinkers, new research has found.

Known for their ability to remove methane from the environment and convert it into a usable fuel, methanotrophic bacteria have long fascinated researchers. But how, exactly, these bacteria naturally perform such a complex reaction has been a mystery. 

The northern tip of Earth stores vast amounts of carbon within its frozen soil, known as permafrost – soil that remains frozen for more than two consecutive years.

In September 2004, USGS scientists detected sudden, but unmistakable, signs that Mount St. Helens was waking up.

When people hear about hurricanes most immediately think of high winds.

The risk of suicide among individuals with post-traumatic stress disorder (PTSD) is much higher than the general population but identifying those individuals at greatest risk has been difficult.

The most common form of maltreatment experienced by athletes is psychological abuse, followed by neglect, a new study from the University of Toronto’s Faculty of Kinesiology & Physical Education has found.