Jet fuel from thin air

Scientists in Switzerland have developed a system which uses solar energy to extract gases such as hydrogen and carbon dioxide from the air and turns them into fuels for transport. So far they have only made small quantities in experimental reactors, however they say with the right investment their alternatives to fossil fuels could be scaled up to provide a climate friendly way to power transport, particularly aviation and shipping. We speak to Aldo Steinfeld and Tony Patt from ETH Zurich and Johan Lilliestam from the University of Potsdam. And what will rises in global temperature mean where you live? An interactive model developed by Bristol University’s Seb Steinig shows how an average global rise of say 1.5C affects different regions, with some potentially seeing much higher temperatures than others. Dan Lunt – one of the contributing authors to this year’s IPCC report discusses the implications. We also look at racism in science, with problems caused by decisions on the naming of ancient bones more than 200 years ago. As more is known about human evolution, the way we classify the past seems to make less sense says Mirjana Roksandic. And the issue of colonialism looms large in the international response to conservation. Its legacy has been discussed at COP26 and as Lauren Rudd, author of a new study on racism in conservation tells us, this hangover from colonial times is limiting the effectiveness of current conservation initiatives. And, The science is unequivocal: human-made climate change is leading the world into an environmental crisis, and time is running out to prevent permanent damage to ecosystems and make the planet uninhabitable for many of us humans. As communities around the world increasingly experience the devastating effects of global warming, world leaders, policy makers and scientists from all over the globe are attending COP26, the United Nation’s major climate summit in Glasgow, Scotland. Each nation will be frantically negotiating its commitments to tackling emissions - many agree it’s a pivotal moment for the future of humanity. Crowdscience hosts a panel of three experts taking part in the conference, to hear their thoughts on what progress has been made so far. They answer listener questions on rising sea levels, explaining that a temperature rise of more than 1.5 degrees won’t just affect small island nations but will have serious consequences for every country in the world. We hear about an interactive atlas developed by the Intergovernmental Panel on Climate Change (IPCC) that shows the impact of higher temperatures in different regions. And presenter Marnie Chesterton asks about the financial barriers that have prevented many people from traveling to COP26 and discovers why it’s vital that people from the global south have their voices heard. Image: President Biden and his wife travelling to the G20 summit in Rome and COP26 in Glasgow. Photo by BRENDAN SMIALOWSKI/AFP via Getty Images.