Climate changeIs China sinking under its concrete boom?Why China's concrete addition is costing the Earth.FutureThe ski resorts saving snowAs global warming is threatening ski holidays, some resorts are reviving an ancient trick: saving snow over the summerFutureWhy there are more climate lawsuits than everGovernments, fossil fuel firms and airlines are increasingly becoming embroiled in climate litigation. Isabella Kaminski analyses what difference this legal action is making.FutureThe second life of Bulgaria's communist-era flatsThe crumbling communist-built apartment blocks of Central and Eastern Europe are in a race to adapt for the climate change era.FutureThe unique songbird that's gone foreverBachman’s warbler is one of 21 species declared extinct last year – but scientists are still discovering its secretsFutureA 'clean' power source's hidden emissionsDams and reservoirs around the world are an underappreciated source of methane. Now start-ups want to capture that gas as a source of power.FutureWhat is a heat pump and how much do they cost?The financial support to help households replace their gas boilers with heat pumps is increasing.Science & EnvironmentWhy the Anthropocene is still not officialIt may be a widely-used term, but geologists still can't agree when the Anthropocene actually started.FutureA satellite's tricky hunt for secret emissionsA new satellite will measure global methane emissions, but why does agriculture's contribution remain so elusive?Future