The Scientists Calculate That Over 500 Kg Of High-strength Astrocrete Could Be Produced Over The Course Of A Two-year Mission On The Surface Of Mars By A Crew Of Six Astronauts.

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Pawel Pieluszyński, a gardener at Brooklyn Bridge Park, on a butterfly-tagging mission this fall. Ganser said. Eric Adams, the Democratic mayoral candidate, has said he is committed to raising the budget to 1 percent , check my source while Republican candidate Curtis Sliwa said in a debate earlier this month that he would raise it to 2 percent. Mr. Ganser said such a move would be transformative. “New York City has done a really good job of reclaiming and building postindustrial habitats, and we have incredibly intact wetlands and grasslands,” said Rebecca McMackin, the director of horticulture at Brooklyn Bridge Park . “We need to protect them.” Under Ms. McMackin’s direction, the park, built on East River piers, is now home to a growing population of rare bees, moths, pollinating flies, butterflies and birds. With enclaves such as these, the city now has 77,580 acres of green space, including wetlands, cemeteries, parks and forests, according to the Natural Areas Conservancy , a nonprofit formed under Mayor Mike Bloomberg’s administration in 2012. Some 30,000 acres are managed by the city, said Meghan Lalor, a spokeswoman for the New York City Department of Parks and Recreation. (Chicago has just 8,800 acres of green space; San Francisco, 5,810.) For Sarah Charlop-Powers, the executive director of the conservancy, city wetlands and forests deserve prioritization, as their benefits extend beyond providing wildlife habitat. Wetlands play a crucial role in reducing flooding during major storms, she said, adding that the city has lost 85 percent of its salt marshes and streams, and 99 percent of its freshwater wetlands, since the 1600s.

https://www.nytimes.com/2021/10/28/nyregion/nyc-wildlife-habitats-animals.html

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This is known as in-situ resource utilisation (or ISRU) and typically focusses on the use of loose rock and Martian soil (known as regolith) and sparse water deposits. However, there is one overlooked resource that will, by definition, also be available on any crewed mission to the Red Planet: the crew themselves. In an article published today in the journal Materials Today Bio, scientists demonstrated that a common protein from blood plasma -- human serum albumin -- could act as a binder for simulated moon or Mars dust to produce a concrete-like material. The resulting novel material, termed AstroCrete, had compressive strengths as high as 25 MPa (Megapascals), about the same as the 20-32 MPa seen in ordinary concrete. However, the scientists found that incorporating urea -- which is a biological waste product that the body produces and excretes through urine, sweat and tears -- could further increase the compressive strength by over 300%, with the best performing material having a compressive strength of almost 40 MPa, substantially stronger than ordinary concrete. Dr Aled Roberts, from The University of Manchester, who worked on the project, said that the new technique holds considerable advantages over many other proposed construction techniques on the moon and Mars. "Scientists have been trying to develop viable technologies to produce concrete-like materials on the surface of Mars, but we never stopped to think that the answer might be inside us all along," he said. The scientists calculate that over 500 kg of high-strength AstroCrete could be produced over the course of a two-year mission on the surface of Mars by a crew of six astronauts. If used as a mortar for sandbags or heat-fused regolith bricks, each crew member could produce enough AstroCrete why not try this out to expand the habitat to support an additional crew member, doubling the housing available with each successive mission. Animal blood was historically used as a binder for mortar.

https://www.sciencedaily.com/releases/2021/09/210913135713.htm