Some sad news and a question on algae...
Harry Hart, an original thinker on making better use of algae - to re-claim desert land as a source of food or fuel, and to draw down carbon dioxide from the atmosphere - has died.
His funeral is today.
Harry was in touch with the BBC for many years, and Newsnight interviewed him back in 2008, when we were working on a film on novel technologies for capturing carbon. You can see the website interview with Harry and Newsnight film here.
Harry had a colourful life. He worked as a television cameraman, filming some of the most notable events and people of the last century, including Mother Teresa when she was relatively unknown and the World Cup of 1966.
After filming the UK nuclear tests in the Monte Bello Islands in Australia and seeing fellow crew members apparently suffer from what they believed to be radiation poisoning, Harry became interested in unconventional ideas on nutrition.
His view of the world, and our use of resources, began to change when he filmed a documentary called One Man's Hunger on poverty in northern India. He saw great promise in growing algae as a source of food, and many mainstream scientists now agree with him.
One group, the FREdome Visionary Trust based in Hertfordshire, is securing start-up funding for a demonstration project along the lines of Harry's thinking.
This uses sewage waste - sent by tanker to arid coastlines, instead of being dumped at sea - to reclaim land and grow algae and other crops as a source of food, fuel and fertiliser, as well as trees to create the required moist microclimate.
The founder of the project, Greg Peachey, has been invited by the Arab Water Forum to talk on desert reclamation at their annual congress later this year.
Harry spent much of his time building up a substantial store of 35 years worth of research materials on this subject, now stored in a barn in Suffolk.
This archive is looking for a home, without which the material it contains will most likely be destroyed. Anyone interested?