Articles

The process of relocating people from New Orleans should start immediately, as the city has reached a “point of no return” that will see it surrounded by the ocean within decades due to the climate crisis, a stark new study has concluded. Ongoing sea-level rise and the rampant erosion of wetlands in southern Louisiana will swallow up the New Orleans area within a few generations, with the new paper estimating the city “may well be surrounded by the Gulf of Mexico before the end of this century”.

El Niño could fuel extreme weather and raise temperatures to record highs this year, but how sure can we be that it will return?

Continued global heating could set irreversible course by triggering climate tipping points, but most people unaware

With warming set to pass the critical 1.5-degree limit, scientists are warning that the world is on course to trigger tipping points that would lead to cascading consequences — from the melting of ice sheets to the death of the Amazon rainforest — that could not be reversed.

For more than three decades, Brazilian climate scientist Carlos Nobre has warned that deforestation of the Amazon could push this globally important ecosystem past the point of no return. Working first at Brazil’s National Institute for Space Research and more recently at the University of São Paulo, he is a global authority on tropical forests and how they could be restored.

President formally files new plans under Paris agreement and hails ‘boldest climate agenda in American history’. Joe Biden has announced tougher targets on the US’s carbon dioxide emissions for the next decade, in a defiant final gesture intended as a “capstone” on his legacy on the climate. With just weeks to go before Donald Trump enters the White House, the Biden administration is formally filing new plans under the Paris agreement – the global climate treaty from which Trump has vowed to withdraw.

Critical tipping points in the climate system are the flies in the ointment when it comes to accurate prediction of where our planet is headed

The Greenland Ice Sheet covers 1.7 million square kilometers (660,200 square miles) in the Arctic. If it melts entirely, global sea level would rise about 7 meters (23 feet), but scientists aren't sure how quickly the ice sheet could melt. Modeling tipping points, which are critical thresholds where a system behavior irreversibly changes, helps researchers find out when that melt might occur.

Anotion prominent in the news today is that the world of 2019 and the decades leading up to it were some kind of “normal” to which civilization might return after the COVID-19 pandemic. Talk of such a return dramatically underlines the educational system's failure to inform most people about human history and our present predicament

A Russian former foreign minister has joined a call for all sides in the Ukrainian war to return to diplomacy and so reduce “the dramatically elevated risk” of a nuclear conflict. The appeal co-authored by Prof Igor Ivanov, now the president of the Russian International Affairs Council, may be a sign that some in the Russian foreign policy establishment believe that pursuing a purely military solution in Ukraine is a strategic mistake.

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One of the most fascinating interpretations of the collapse of civilization is Joseph Tainter’s idea that it is due to “diminishing returns.” It is a well-known concept in economics that Tainter adapts to the historical cycle of civilizations, focusing on the control structures designed to keep together the whole system, the bureaucracy for instance...