A pretty basic Powershell command that everyone uses to list environment variables is:

							ls env:

A few caveats here: this is NOT going to work in Linux or MacOS because in those environments the alias ls is not defined[^1]. Therefore the safest bet is to use Get-ChildItem instead.

Also, this is shown in table format (which is nice), but it truncates long values (which is not nice with variables like PATH):

Table format with truncate

In order to avoid that we can re-format the output in this way:

							Get-ChildItem env: | Format-Table -Wrap

This will show a long value like this: Table format with wrap

Finally, if you miss the classical format you get from Linux env or Windows CMD set, you can do the following:

							Get-ChildItem env: | % { "$($_.Name)=$($_.Value)" }

It shows like this: Classical format

[^1]: Microsoft Powershell Aliases Documentation