Internet becomes haven for climate-denial blogs and websites which downplay or deny existence of man-made global warming despite scientific consensus.
Scientists previously estimated that super-eruptions happen every 45,000-714,000 years but new estimates say they happen a lot more often.
Sand and gravel account for the largest volume of any solid material extracted globally, according to research.
Millions of tonnes of ash spewed into atmosphere can severely reduce Earth's temperatures.
Scientists have identified 112 "robust source reefs" that could repopulate and even repair the damage that the Great Barrier Reef has suffered.
Dr Ricardo Jaña, glaciologist at the Chilean Antarctic Institute, said the iceberg could "become a threat" when it disintegrates into smaller pieces.
While glitter may seem harmless, it can be washed into the seas causing damage to the marine environment.
Environmental champion, who was first person to walk to both poles, uses Antarctic trek as green wake-up call.
The Plastic Bank is encouraging people to collect plastic waste and exchange it for money or essential items.
Graviky Labs has developed a technique to make ink from pollution. So far it has cleaned roughly 1.6 trillion litres of air.
Experts advise firm in charge of Fukushima nuclear power plant, damaged by a tsunami in 2011, to release about 1m tonnes of radioactive water into the Pacific.
Volcanologists say the volcano has entered a new phase with magma now visible at Agung's peak, meaning a greater risk of a larger eruption.
India, which became the world's second largest sulphur dioxide emitter in 2010, is now closing in on China.
Australian scientists say that some native plant species could be used to "make contaminated regions safe again".
New audit by utility company points to 'hidden environmental menace' of water leakage.