Who should pay for the climate crisis? “The luckiest – and I’m certainly in that group – we owe a lot to society,” Gates told BBC News.

The Microsoft co-founder is the latest high-profile US business leader to visit China in recent months.

Shares in Musk's electric car company Tesla have almost doubled since the start of the year.

The Microsoft co-founder also believes artificial intelligence will "dramatically" transform humanity.

The Microsoft co-founder and philanthropist tells Amol Rajan that immunising against disease is a better use of money.

The Microsoft co-founder and philanthropist shuns jewellery but says he does not go as far as re-using wrapping paper.

Livestock - such as cows - produce methane when their stomachs are digesting hard fibres.

The proceeds of the largest art auction ever will go to charity, Christie's auctioneers said.