Because he saves people's lives every day.

The phrase "потому что он каждый день спасает жизни людей" translates into English as: "because it saves people's lives every day." Here's a more detailed explanation of how it might be used in context:

This phrase is likely describing the importance or critical function of something, possibly a service, tool, or system, that plays a crucial role in saving lives on a daily basis. For example, it could refer to a medical technology, emergency response system, or even a particular procedure or piece of equipment that directly contributes to the well-being of individuals in urgent situations.

In general, this sentence highlights the indispensable nature of the subject, emphasizing its life-saving impact and how it affects people on a regular basis. The phrase could also be used metaphorically to describe something that has a major, often overlooked, impact on safety and health, much like emergency responders or advanced medical equipment that operate quietly but are vital in critical moments.