Unless global heating is reduced to 1.2C ‘as fast as possible’, warm water coral reefs will not remain ‘at any meaningful scale’, a report by 160 scientists from 23 countries warns Sign up for climate and environment editor Adam Morton’s free Clear Air newsletter here The earth has reached its first catastrophic tipping point linked to greenhouse gas emissions, with warm water coral reefs now facing a long-term decline and risking the livelihoods of hundreds of millions of people, according to a new report. The report from scientists and conservationists warns the world is also “on the brink” of reaching other tipping points, including the dieback of the Amazon, the collapse of major ocean currents and the loss of ice sheets. Sign up to get climate and environment editor Adam Morton’s Clear Air column as a free newsletter Continue reading... from The Guardian https://ift.tt/O0bGgzr via IFTTT
Chemical analysis reveals origin of coinage that stimulated trade and helped fuel development of new towns from seventh century
Several decades after the Sutton Hoo burial, starting in about AD660, there was a sudden rise in the number of silver coins in circulation in England, for reasons that have long puzzled archaeologists and historians.
The new rush of silver coinage stimulated trade and helped fuel the development of the new towns springing up at the time – but where did it come from? Were the Anglo-Saxon kings recycling old Roman scrap metal? Or had they found lucrative sources from mines in Europe?
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