For scientists used to thinking in thousands or millions of years, the scale and speed of recent changes have been hard to process. No one denies that over the past few centuries, and especially the past few decades, everything from species extinctions to increased atmospheric carbon will be recorded in rocks for geologists to pore over in the distant future. The argument is over whether this constitutes a new epoch, an “event”, or something else entirely.

The chair and vice-chair who disagreed with their colleagues, have written for us with two others from the Anthropocene Working Group to explain their reasoning and why they feel we should recognise a new epoch.

Meanwhile huge volumes of cancer-causing “forever chemicals” have been found flowing into the River Mersey. Patrick Byrne, a water pollution expert at Liverpool John Moores University investigates. And after the Irish government loses a crucial referendum on modernising the constitution, we look at what went wrong and why it matters.

Will de Freitas

Environment + Energy Editor

Mr. Tempter / shutterstock

What the Anthropocene’s critics overlook – and why it really should be a new geological epoch

Simon Turner, UCL; Colin Waters, University of Leicester; Jan Zalasiewicz, University of Leicester; Martin J. Head, Brock University

Geologists recently voted down a proposal to formally recognise the Anthropocene.

Heavy industry and dense urban populations both contribute to high levels of effluent containing toxic forever chemicals that don’t biodegrade. Shaun Jeffers/Shutterstock

High levels of PFAS forever chemicals found flowing into River Mersey – new study

Patrick Byrne, Liverpool John Moores University

Huge amounts of PFAS come from wastewater treatment plants, new study finds.

Leo Varadkar reacts to the news that his government has lost both referendums. Alamy/Damien Storan

Ireland referendums: what went wrong for the government and why double defeat draws a line under a decade of constitutional reform

Eoin Daly, University of Galway

Leo Varadkar has been criticised for expecting the public to vote in favour of adding vague language to the constitution.

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