As demand for smartphones, laptops and electric vehicles has soared, so has demand for the minerals - such as cobalt and coltan - for the batteries that power them. The Democratic Republic of the Congo has vast reserves of these minerals, and their extraction is fuelling the country's civil war. Josh Toussaint-Strauss finds out more about how global demand for tech is causing human suffering in central Africa, and how we, and western powers and companies, are complicit

Net zero is a target that countries should be striving for to stop the climate crisis. But beyond the buzzword, it is a complex scientific concept – and if we get it wrong, the planet will keep heating.

Biodiversity and environment reporter Patrick Greenfield explains how a loophole in the 2015 Paris climate agreement allows countries to cheat their net zero targets through creative accounting, and how scientists want us to fix it

In Sudan, fighters from the Rapid Support Forces (RSF), a paramilitary group, appear to have filmed and posted online videos of themselves glorifying the burning of homes and the torture of prisoners. These videos could be used by international courts to pursue war crime prosecutions.

Kaamil Ahmed explains how the international legal system is adapting to social media, finding a way to use the digital material shared online to corroborate accounts of war crimes being committed in countries ranging from Ukraine to Sudan

• Russia-Ukraine war – latest news updates

China has dramatically increased military activities around Taiwan, with more than 3,000 incursions into Taiwan's airspace in 2024 alone. Amy Hawkins examines how Beijing is deploying 'salami-slicing' tactics, a strategy of gradual pressure that stays below the threshold of war while steadily wearing down Taiwan's defences. From daily air incursions to strategic military exercises, we explore the four phases of China's approach and what it means for Taiwan's future