Ending use of the humble combustion engine, while an easy answer, has proven much more difficult to implement. In truth, we all love the luxuries that the combustion engines of the world bring, even if we loath the long term impacts. In this episode, we explore hybrid technologies, cleaner fuels and the way forward for cleaner forms of combustion in the 21st century.

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Join us as we explore some of the latest research into desert agriculture and why on earth anybody thinks it's a good idea. Scorching sun, infertile soil and lack of water are but a few of the challenges facing the transformation of desert into farm. The alternatives, however, are equally unpalatable - bulldozing rainforest and other pristine environments for massive mono-cropping.

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In this special bonus episode, we speak with Carlos Duarte about seagrasses, how seaweed might mitigate cow farts, and how blue carbon might save the planet.

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With our fresh water sources dwindling, the desalination of salt water is a viable solution. The trouble is, desalination, as it is done now, is highly energy intensive, and can be ecologically damaging. So how do we generate potable water, without causing additional problems—has anyone cracked the code on sustainable desalination? In this episode, we speak with New York Times climate reporter Henry Fountain, as well as a range of experts on energy, water and the environment to try and get to the bottom of this up and coming method of potable water production.

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Where is the bright, solar-powered future we've heard about for decades? We speak to the scientists turning skyscrapers into power plants, we explore solar with a side of potable water and more.

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The Red Sea is considered a living model for the oceans of the future. We speak with researchers about corals and capitalism, whale shark cartoons, and how robots might take underwater jobs too.

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