Climate change: By 2025 we will have more CO2 than any time in the past 3.3 million years

By 2025, atmospheric CO2 levels – a key contributor to global warming and climate change – are expected to be higher than when the planet was 3C warmer 3.3 millions of years ago. During a period known as the Pliocene epoch, Earth was hotter than today with smaller ice caps and higher sea levels. At […]

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