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Swarms in South Korean capital trigger heated debate over pest control as experts say rising temperatures partly to blame ...

Editorial: Clean tech's key minerals now drive western rearmament, reviving extractive ambition and exposing the toxic cost of dependence ...

Unusually aggressive lone star ticks, common in the south-east, are spreading to areas previously too cold for them ...

Guardian investigation sheds light on private intelligence industry that runs covert surveillance operations ...

Exclusive: Doctors say clean air zones need expanding, after 45,458 visits in first half of this year - up from 31,376 last year ...

Negotiators doubt countries' financial and environmental commitment as military and trade wars divert attention ...

The Poo-tastic Tasmanian Paint Off asks artists to use a unique medium to paint portraits of people they admire ...

It is what we might call the HS2 fallacy: new reservoirs as tall as high-rise buildings that boost water companies' assets ...

Experts say brutal temperatures across much of US set to become more common as planet continues to heat up ...

Authorities in Spain, Portugal, Greece and France issue extreme heat, wildfire and health warnings ...