Luchtmeetnet vs Website Carbon

Luchtmeetnet is the Dutch national air-quality monitoring network (run by RIVM and partners), publishing measured and forecast pollutant levels from over a hundred stations across the Netherlands. It's a fully open government data feed — no key or registration needed.

Website Carbon estimates the CO2 emitted by loading a web page, based on page weight and whether the host uses green hosting, returning a digital carbon rating alongside the raw gCO2e figure. As of 14 July 2025 the provider retired public access to its convenience /site endpoint (which fetched a URL for you); the /data endpoint, which takes bytes and a green-hosting flag directly, remains free and open with no key.