Buffett donates $37bn to charity

BBC NEWS Business Buffett donates $37bn to charity: "Billionaire investor Warren Buffett is to donate about $37bn (�20bn) - most of his vast personal fortune - to Bill Gates' charitable foundation."

Drug firms a danger to health - report

Guardian Unlimited Special reports Drug firms a danger to health - report: "Drug companies are accused today of endangering public health through widescale marketing malpractices, ranging from covertly attempting to persuade consumers that they are ill to bribing doctors and misrepresenting the results of safety and efficacy tests on their products."

'Warm' species invading Antarctic

BBC NEWS Science/Nature 'Warm' species invading Antarctic: "Scientists are calling for action to prevent foreign species from taking hold in Antarctica and wrecking the continent's unique ecosystems."

Desert cities are living on borrowed time, UN warns

Guardian Unlimited Special reports Desert cities are living on borrowed time, UN warns: "The 500 million people who live in the world's desert regions can expect to find life increasingly unbearable as already high temperatures soar and the available water is used up or turns salty, according to the United Nations."

All Tesco bags 'to be degradable'

BBC NEWS UK All Tesco bags 'to be degradable': "Supermarket giant Tesco has said all its carrier bags will be degradable from September. "