Last year 'fifth-hottest on record', carbon dioxide and methane hit highs

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Last year was the world's fifth-hottest on record, while planet-warming carbon dioxide and methane in the atmosphere hit new highs in 2021, say EU scientists.

“These events are a stark reminder of the need to change our ways, take decisive and effective steps towards a sustainable society and work towards reducing net carbon emissions,” C3S director Carlo Buontempo said.and methane, the main greenhouse gases, continued to climb, and both hit record highs in 2021. Levels of COin the atmosphere reached 414.3 parts per million in 2021, up by about 2.4ppm from 2020, the scientists said.

C3S said levels of methane, a particularly potent greenhouse gas, have jumped in the past two years, but the reasons are not fully understood. Emissions of methane range fromAfter a temporary dip in 2020 at the onset of the Covid-19 pandemic, provisional data suggest global COLast summer was Europe's hottest on record, CS3 said, after a warm March and unusually cold April that had decimated fruit crops in countries including France and Hungary.

In July and August, a Mediterranean heatwave stoked intense wildfires in countries including Turkey and Greece. Sicily set a new European temperature high of 48.8°C, a record awaiting official confirmation. In July, more than 200 people died when torrential rain triggered deadly flooding in Western Europe. Scientists concluded that climate change had made the floods at least 20% more likely.

Also that month, floods in China's Henan province killed more than 300 people. In California, a record-smashing heatwave was followed by the second-biggest wildfire in the state's history, decimating land and belching out air pollution.

 

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