The world’s wealthiest 10 per cent of individuals are responsible for two-thirds of global warming since 1990, researchers said on Wednesday
How the rich consume and invest has substantially increased the risk of deadly heatwaves and drought, they reported in the first study to quantify the impact of concentrated private wealth on extreme climate events.
“We link the carbon footprints of the wealthiest individuals directly to real-world climate impacts,” lead author Sarah Schoengart, a scientist at ETH Zurich, told AFP.
“It’s a shift from carbon accounting toward climate accountability.”
Compared to the global average, for example, the richest one per cent contributed 26 times more to once-a-century heatwaves, and 17 times more to droughts in the Amazon, according to the findings, published in Nature Climate ChangEmissions from the wealthiest 10 per cent in China and the United States — which together account for nearly half of global carbon pollution — each led to a two-to-threefold rise in heat extremes.
Burning fossil fuels and deforestation have heated Earth’s average surface by 1.3 degrees Celsius, mostly during the last 30 years.
Schoengart and colleagues combined economic data and climate simulations to trace emissions from different global income groups and assess their impact on specific types of climate-enhanced extreme weather.
The researchers also emphasised the role of emissions embedded in financial investment rather than just lifestyle and personal consumption.e.
“Climate action that doesn’t address the outsized responsibilities of the wealthiest members of society risks missing one of the most powerful levers we have to reduce future harm,” said senior author Carl-Friedrich Schleussner, head of the Integrated Climate Impacts Research Group at the International Institute for Applied Systems Analysis near Vienna.
– Billionaires tax –
Owners of capital, he noted, could be held accountable for climate impacts through progressive taxes on wealth and carbon-intensive investments.
Earlier research has shown that taxing asset-related emissions is more equitable than broad carbon taxes, which tend to burden those on lower incomes.
Recent initiatives to increase taxes on the super-rich and multinationals have mostly stalled, especially since Donald Trump regained the White House.
Last year, Brazil — as host of the G20 — pushed for a two-per-cent tax on the net worth of individuals with more than $1 billion in assets.
Although G20 leaders agreed to “engage cooperatively to ensure that ultra-high-net-worth individuals are effectively taxed,” there has been no follow-up to date.
In 2021, nearly 140 countries agreed to work toward a global corporate tax for multinational companies, with nearly half endorsing a minimum rate of 15 per cent, but those talks have stalled as well.
Almost a third of the world’s billionaires are from the United States — more than China, India, and Germany combined, according to Forbes magazine.
According to anti-poverty NGO Oxfam, the richest 1 per cent have accumulated $42 trillion in new wealth over the past decade.
It says the richest one per cent have more wealth than the lowest 95 per cent combined.
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