Google's Liquid Cooling

I’ve always wondered: what if we could actually use this heat? For example, could we take the heated water from cooling a data center and pump it to places that need it (Greenhouses, Industrial processes, Desalination and water treatment)?

Happens for urban data centers/internet exchanges:

www.aboutamazon.com/news/sustainability/the-super-efficient-heat-source-hidden-below-amazons-seattle-headquarters

It's done sparingly. If you search for "data center waste heat uses" you'll find cases like you mention [1] [2] but the ROI on implementing it seems to be lower than renewable energy infrastructure.

[1] https://www.informationweek.com/sustainability/reusing-waste... [2] https://www.techspot.com/news/97995-data-center-uses-waste-h...