Data centers are using more power than ever to power our digital world and we must keep improving data center efficiency to be sustainable. Liquid cooling can reduce the power consumed by data centers. Data center operators are concerned about leaks, downtime, unfamiliarity with liquid cooling and worries about vendor supply chains. Negative pressure liquid cooling eliminates the fear of leaks, N+1 CDUs and air back up cooling makes downtime unlikely, and automatic coolant quality control prevents problems in coolant chemistry. Open and honest discussion about problems and solutions can allow liquid cooling to proliferate and open the door to energy and carbon savings.