Include environment in URL automatically?

I'm building an app where I want to have users be able to send URLs to each other and have data already be populated. I have set this up using the Page Settings, and everything works great, except that we have multiple environments, and I can't ensure that 2 users will have the same environment selected.

I know about the _environment query string parameter, but I can't find a way to make sure that this is automatically set to the current in the address bar of the browser. Is there a way to make sure that _environment is always set for viewers/editors of my app?