Explainer: Why is the limit of global warming 1.5 degrees Celsius

Climate scientists aim to limit global temperature rise to 1.5°C above pre-industrial levels, as the IPCC report highlights severe consequences beyond this limit. At 1.5°C, extreme land temperatures could rise by 3°C, impacting biodiversity and human lives. At 2°C, the impact intensifies, with potential loss of over half the climate range for numerous species and near-total coral reef destruction.  Photo: Reuters