Jude Walker, an 11-year-old boy, is on an odyssey he hopes will help save the planet: he is walking to London from northern England in a bid to garner support for a carbon tax to tackle carbon emissions.

Partly inspired by activist Greta Thunberg, Walker, from Hebden Bridge in Yorkshire, has braved hills, rain and doubts along his 210-mile trek to the British parliament in Westminster, central London.

Global warming is dangerously close to spiralling out of control and the world is already certain to face further climate disruptions for decades, if not centuries, to come, a United Nations climate panel said this month. read more

While most political leaders and investors accept the science behind climate change, there are deep divisions over what must be done to stop it, how radical the response should be - and who should pay for it.