"Diesel engine fumes can cause lung cancer and belong in the same potentially deadly category as asbestos, arsenic and mustard gas, World Health Organisation (WHO) experts said on Tuesday."

"A new US-led study, featuring research by Tasmanian scientists, has concluded that warming ocean temperatures over the past 50 years are largely a man-made phenomenon."

"Whether or not fishermen should be permitted to throw away healthy fish at sea instead of selling them to consumers will come to a head at a crunch meeting of Europe's fisheries ministers on Tuesday."

"RIO de JANEIRO -- The Rio+20 Secretary-General said today that the absence of such world leaders as U.S. President Barack Obama, German Chancellor Angela Merkel and UK Prime Minister David Cameron will not undermine the sustainable development summit later this month."

"UN's vision for one deal to save the Earth is in peril as countries bicker over phrasing of clauses and key terms in the draft text."

"Scientists have discovered a vast pea-soup-green bloom of tiny plant-like marine organisms under Arctic Ocean ice. The bloom represents an enormous, and until now, unknown reservoir of food for marine life in frigid waters at the top of the world."

"LONDON -- The price of oil fell to below $83 a barrel on Friday after Federal Reserve Chairman Ben Bernanke gave no hint that the central bank is planning stimulus measures to revive a faltering recovery."

"Parasitic mites wiping out bee colonies by transmitting deadly virus directly into the bloodstream of the bees, research reveals"

"There is a 50 percent chance the feared El Nino weather pattern which can trigger droughts in Southeast Asia and Australia and floods in South America may strike later this year, the U.S. Climate Prediction Center warned on Thursday."

"In its strongest prediction so far that El Nino could emerge, the CPC said conditions are still expected to be neutral between June and August, but there is a 50 percent likelihood that El Nino will develop in the remainder of the year.

"Experts are warning that the public dangerously underestimates the health risks linked to smoking cannabis."