Trump administration briefing: landmark climate ruling in jeopardy

Environmental Protection Agency to reconsider harmful effects of pollution; justice department demands shelter release names of migrants - key US politics stories from Wednesday at a glance

Donald Trump has previously called the climate crisis a hoax" and dismissed those concerned by its worsening impacts as climate lunatics", but now the Environmental Protection Agency (EPA) has gone even further under his authority, issuing an extraordinary cavalcade of pollution rule rollbacks.

The agency has announced it would potentially scrap a landmark 2009 finding by the US government that planet-heating gases, such carbon dioxide, pose a threat to human health.