Earth Changes
The amount of new calcium carbonate being added by coral reefs is at least half, and in some places 70 percent lower, than it was thousands of years ago.
Biologists have long sounded the alarm for reef-building corals, on which nearly half a billion people depend for their livelihood from fishing and tourism.
Previous research has estimated that coral cover is declining by as much as two percent per year in parts of the Indian Ocean and the Pacific. In the Caribbean, cover has shrunk by around 80 percent on average since the mid-1970s.
A vast mangrove forest shared by India and Bangladesh that is home to possibly 500 Bengal tigers is being rapidly destroyed by erosion, rising sea levels and storm surges, according to a major study by researchers at the Zoological Society of London (ZSL) and others.
The Sundarbans forest took the brunt of super cyclone Sidr in 2007, but new satellite studies show that 71% of the forested coastline is retreating by as much as 200 metres a year. If erosion continues at this pace, already threatened tiger populations living in the forests will be put further at risk.
The sink hole was 300 square meters wide (3229.2 square feet), and appears to be growing. Thankfully there does not appear to be any injuries at present.
This video shows the moment the sinkhole expanded, taking out much of the building and creating a chaotic scene.

Disappearing world … a project for climate refugees near Cox's Bazar, as people have been forced from islands such as Kutubdia in the Bay of Bengal.
School teacher Nurul Hashem lives in a grass hut set among coconut palms and pine trees, just yards from a pristine beach on the sparkling Bay of Bengal. It sounds idyllic, but he longs to return to the island of Kutubdia, 50 miles away, where his family home has been swallowed by ever-rising tides and is now out at sea under several feet of water.
To make matters worse, the local government, which welcomed him when he arrived three years ago, wants him and thousands of other families who have fled to the coast from the island, to make way for an airport and hotel developments.
Kutubdia is one of many islands off Bangladesh and India affected by increasingly rapid erosion and some of the fastest recorded sea-level rises in the world. These "vanishing islands" are shrinking dramatically. Kutubdia has halved in size in 20 years, to around 100 sq km. Since 1991, six villages on the island of fishermen and saltworkers have been swamped and about 40,000 people have fled. Like Hashem, most have relocated to the coast near Cox's Bazar.
"An increase in the intensity of extreme weather events such as storms like Sandy and Katrina, coupled with sea-level rise and the effects of increased human development along the coasts, could affect the sustainability of many existing coastal communities and natural resources," report co-author Virginia Burkett, of the U.S. Geological Survey, said in an advisory.
The study warns that approximately 50 percent of Americans live in coastal watershed communities - a number that is projected to grow - that face increasing flood risks due to storm surges, extreme weather and rising sea levels as the climate grows more unpredictable. These risks are compounded by changes to coastal ecosystems brought about by human activity, causing "toxic algal blooms" and depleted fish stocks, loss of wetlands and dying coral reefs.

Fisheries officers have sent samples of the dead animals to a wildlife pathologist at the Atlantic Veterinary College
A group of students from the Charlottetown-based Atlantic Veterinary College found as many as 50 dead seals over the weekend.
The students came upon the bloody carcasses of grey seals either dead or dying. Many of seals were pups.
Aside from the Meric-Ipsala road, 37 village roads have also been shut down to traffic due to heavy snowfall in the region.
Road crews are working to open the Meric-Ipsala road to traffic again on Sunday.
Snow thickness at Uludag, one of the favorite skiing centers of Europe, reached 215 centimeters on Sunday.
The Weather Department of the north-western province of Bursa said that they expected snowfall at Uludag on both Sunday and Monday.
The outage stretches from 11th Street to just west of 20th, from Leavenworth to Farnam. OPPD said it plans to have power restored by sometime Monday evening.
Due to the outage, the Douglas County Courthouse will be closed Monday. Those who are scheduled to appear in court are being sent next door to the Douglas County City building. The MUD building at 17th and Harney is closed until further notice.
About 4,000 of them laid strewn for miles at the Humberston Fitties yesterday, turning the beach into a marine life graveyard.
It is thought they were swept onto the sands following storms out in the North Sea and the sub-zero temperatures.
Rachael Shaw, of the Lincolnshire Wildlife Trust, said: "It's possible that bad weather or storms out at sea, perhaps associated with high tides, have caused the mass stranding of these starfish."
Gold Coast holiday-maker Lionel Armitstead says the white froth has come up the foreshore at Burleigh Heads and is covering pedestrian paths and picnic areas.
In some places the suds are up to one metre high.
'It's like a snowstorm,' he told AAP.
'The kids are up to their shoulders basically ... I've never seen anything like it.'













Comment: We find it interesting that the number of sinkholes are increasing... is the planet literally 'opening up'?