[v8xi]

Thats true, but we do tremendous amounts of human DNA sequencing for certain causes at scale(e.g. understanding/treating cancer) whereas environmental sequencing is usually done to monitor/search for things at a much lower sample rate(e.g. disease load in wastewater, biodiversity from environmental samples, and looking for natural products produced by the zillions of bacteria/archaea in the oceans). From e.g. a wastewater sample perspective the latter type is going to be the majority of data, we just filter out the stuff of interest and analyze it in situ - but theres no reason to store 1B E coli genomes whereas this is necessary if we want to understand cancer evolution.