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Climate in crisis

Counties are told they are not doing enough on climate change and at the same time the impact of air pollution is likened to smoking

Pledges to reduce greenhouse gas emissions are largely unachievable says a major audit of commitments to the Paris Climate Accord.

Air pollution in Delhi is so bad, breathing the toxic particles has been likened to smoking. Can a scientific assessment of the multiple causes help provide a way forward?

We examine a new way of making new plastic – from old plastic.

And why sending some stem cells to the international space station might help astronauts travel further.

(Image: Tourists wearing masks to protect themselves from smog in New Delhi, India. Credit: Sushil Kumar/Hindustan Times via Getty Images)

Presenter: Roland Pease
Producer: Julian Siddle

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29 minutes

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Gravitational Waves

Gravitational Waves

Gravity and ripples in the fabric of space time - what do these mean for us?