There may be other websites that are giving information on Low Emission Zones.
They only give you information on the low emission zones with stickers. They then sell you the stickers, around 5 times as expensive as getting them from the official sources.
It also gives misleading information about which schemes have been confirmed and are coming.
From urbanaccessregulations.eu you can find all the full, up to date information on ALL Low Emission Zones, Urban Road Tolls and other Access Restrictions in Europe.