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- ;Conservation and recycling go through the roof : Conservation of energy and materials, along with recycling, will be so ubiquitous and socially mandated that tod ;No space elevator: Problems with materials, problems with crossing radiation belts, problems with safety, all doom thi58 KB (9,965 words) - 13:51, 19 October 2022
- 341. Dark Surface Materials Surrounding Rima Marius.53 KB (7,303 words) - 06:50, 13 July 2019