The Arctic heatwave: here's what we know

The science may be complicated — but the need for action now couldn’t be clearer. There’s an Arctic heatwave: it’s 38°C in Siberia. Arctic sea ice coverage is the second-lowest on record, and 2020 may be on course to be the hottest year since records began. Dr Tamsin Edwards, senior lecturer of geography at King's College London, gives her view and sharers her concerns in the Guardian.