Knowing that there is a problem is not enough. We need to know how much of a problem we have, is light pollution getting worse or is it getting better.
The more sky glow we see - the fewer stars we can see - but it can change over time. For better or for worse.
New technology lighting and fittings can reduce or increase light pollution of the night. More energy efficient lighting may even lead to more lighting.
There are several ways to monitor night sky quality.