multigrid.md grid tech entity materials ฯ 0.02% water clean water natural water salt water grey water heat and cold gas oxygen co2 hydrogen energy biogas electricity data ethernet optical transport road trail Linked References architecture bip-39 wordlist cyber/context/distribution/128k cyber/context/distribution/1400k cyber/context/distribution/200k cyber/context/distribution/32k cyber/context/distribution/500k cyber/context/distribution/900k Local Graph