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In the UK thousands of scientists have signed open letters to the UK government protesting cuts to international funding announced this week. Abruptly and severely, the cuts may end hundreds of international collaborations between UK scientists and colleagues around the world working on health, climate change, disaster resilience, sustainability and many development topics.

Professor Jenni Barclay is a volcanologist at the University of East Anglia, and is one of the organisers of the protest. At the University of Cape Town, Dr Chris Trisos is the director of the Climate Risk Lab at the African Climate and Development Initiative, one of the authors of the IPCC 6th assessment, and he has just learned his funding will be terminated, as the UK’s Royal Society must trim its output in this area by two thirds. They speak about the repercussions to Roland Pease.

Antarctica Iceberg A74 break away
Earlier this week German Research Vessel Polarstern released images from its remarkable circumnavigation of Antarctica’s latest iceberg, known as A74. This is the largest chunk of ice to break away from this sector of Antarctica since 1971, approaching the same size of Greater London. Dr Autun Purser describes a hair-raising voyage between the narrow gap left between the berg and the shelf, including the first images of life that have spent at least 50 years in total darkness, hundreds of miles from the open sea.

Are the space junk and carbon footprint issues of extra-terrestrial endeavours solvable?
The space industry, with its fuel-burning rockets, requirements for mined metals and inevitable production of space junk, is not currently renowned for its environmental credentials. Can space exploration ever be truly environmentally friendly? Marnie Chesterton answers a selection of listeners’ questions on the topic of space environmentalism. She starts by examining the carbon footprint of spaceship manufacturing here on Earth, and asking whether reusable rocket ships such as Space X or Virgin Galactic offer a green route for commuting or tourism in low Earth orbit.

Just beyond our atmosphere, space junk and space debris are multiplying at an exponential rate, jeopardising our communications and mapping satellites, and even putting our access to the wider solar system at risk. As more probes and landers head to the Moon and Mars, what plans are in place to deal with space debris far beyond Earth?

Image: Polarstern between Brunt and iceberg A74, Antarctica
Credit: RalphTimmermann