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.

More than 2,000 people and 40 local, national and international emergency response organisations, will be taking part in the world’s largest annual international disaster simulation exercise this week.

Australia’s world-famous Great Barrier Reef is located in the Coral Sea, east of Queensland and on May 14, Tropical Cyclone Ann was moving over it.

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.

Climate change is causing old trees in northern China’s permafrost forests to grow faster, likely thanks to warmer soil temperatures, according to recent research.

NASA-NOAA’s Suomi NPP satellite passed over the Southern Pacific Ocean and captured a visible image of Tropical Cyclone Ann in the Coral Sea, off the east coast of Queensland, Australia.

Topping the list of Australia’s major crops, wheat is grown on more than half the country’s cropland and is a key export commodity.