The company's listing raised $87.5bn, compared with the $75bn it was initially thought.

Musk is now worth $1.11tn according to the Bloomberg rich list, while SpaceX listed on the Nasdaq stock exchange with a value of $2.2tn.

Water samples are assessed for pollution levels and any impact climate pressures may be having on the river system.

The project will allow volunteers to help defend red squirrels by monitoring footage remotely.

The project's long-term goal is to reintroduce the wetland insect to more sites.

We spent a day out in the city with a thermal camera, recording surface temperatures indoors and outdoors.