A global rice shortage that has seen prices of one of the world’s most important staple foods increase by 50 per cent in the past two weeks alone is triggering an international crisis, with countries banning export and threatening serious punishment for hoarders.

With rice stocks at their lowest for 30 years, prices of the grain rose more than 10 per cent on Friday to record highs and are expected to soar further in the coming months. Already China, India, Egypt, Vietnam and Cambodia have imposed tariffs or export bans, as it has become clear that world production of rice this year will decline in real terms by 3.5 per cent.

HUMANS are causing such unprecedented climatic change and mass extinctions it is creating a new geological age, according to a leading environmental scientist.

The planet is already amid a “human-induced mass extinction event” which is defining a new geological age known as the Anthropocene, says Professor Will Steffen, director of the Centre for Resource and Environmental Studies at Canberra’s Australian National University.

A chunk of Antarctic ice about seven times the size of Manhattan suddenly collapsed, putting an even greater portion of glacial ice at risk, scientists said Tuesday.

Satellite images show the runaway disintegration of a 160-square-mile chunk in western Antarctica, which started Feb. 28. It was the edge of the Wilkins ice shelf and has been there for hundreds, maybe 1,500 years.

This is the result of global warming, said British Antarctic Survey scientist David Vaughan.

With little-noticed procedural and policy moves over several years, Bush administration officials have made it substantially more difficult to designate domestic animals and plants for protection under the Endangered Species Act.

Controversies have occasionally flared over Interior Department officials who regularly overruled rank-and-file agency scientists’ recommendations to list new species, but internal documents also suggest that pervasive bureaucratic obstacles were erected to limit the number of species protected under one of the nation’s best-known environmental laws.

The capital’s famous cherry trees are primed to burst out in a perfect pink peak about the end of this month. Thirty years ago, the trees usually waited to bloom till around April 5.

In central California, the first of the field skipper sachem, a drab little butterfly, was fluttering about on March 12. Just 25 years ago, that creature predictably emerged there anywhere from mid-April to mid-May.