内容摘要：This could also come, more circuitously, through the application of a planned carbon trade tax in various jurisdictions.

This could also come, more circuitously, through the application of a planned carbon trade tax in various jurisdictions.

The potential is huge - for business it promises a workforce that doesn't need holidays or pay rises.It could also be the ultimate domestic appliance. After all, who wouldn't want a machine that could do the laundry and stack the dishwasher.

But the technology is still some way off. While robotic arms and mobile robots have been common in factories and warehouses for decades, conditions in those workplaces can be controlled and workers can be kept safe.Introducing a humanoid robot to a less predictable environment, like a restaurant or a home, is a much more difficult problem.To be useful humanoid robots would have to be strong, but that also makes them potentially dangerous - simply falling over at the wrong time could be hazardous.

So much work needs to be done on the artificial intelligence that would control such a machine."The AI simply has not yet reached a breakthrough moment," a Unitree spokesperson tells the BBC.

"Today's robot AI finds basic logic and reasoning – such as for understanding and completing complex tasks in a logical way – a challenge," they said.

At the moment their G1 is marketed at research institutions and tech companies, who can use Unitree's open source software for development.Dan's work now forms part of a special exhibition at the National Museum Cardiff, exploring how the valleys were transformed by the explosion of industry and its subsequent decline.

More than 200 pieces of art are on display - including paintings, photography, film and applied art.The exhibition begins pre-industry, when the south Wales valleys were sparsely populated.

During the industrial revolution of 1760-1840, the large scale exploitation of iron and coal began to transform the landscape.As industry boomed, previously rural areas became thriving communities.