The long read: After his mother died, Otto became convinced he’d been wronged by the forensic investigators – and that one of them was a fraud. The truth was even stranger

The injection of thermal energy, 40 times that used by humanity in total, comes amid an increasing rise in sea levels and continuing acidification

Only 26% of PHEVs sold across top 20 models can use chargers with power of 50kW or more, analysis finds

Tory leader claims prime minister is avoiding difficult decisions as she urges him to increase defence spending

Ineos founder Sir Jim Ratcliffe tells the BBC he thinks the country is "on the slide" and calls for more investment in the North Sea.

Thousands of miles of new power lines are needed to deliver climate targets and energy security, but bills will rise in the short term and opponents are mobilising