Best Danish data service Energi Alternatives (2026)

Environmental impact API for tree planting, carbon offsetting and ocean cleanup

Real-time air quality data including AQI and pollutant concentrations for worldwide locations

Daily Forecast pollen conditions data for a specific location

API to calculate carbon (C02) emissions estimates for common C02 emitting activities

A real-time RESTish web API for worldwide carbon dioxide levels.

Calculate the environmental footprint created by a broad range of emission-generating activities

API calculates the impact of common carbon-intensive activities in real time

API calculates and validates the carbon footprint

Green Power Index for Germany (Grünstromindex/GSI)

Air quality and weather data

Predicted and actual air quality components for The Netherlands (RIVM)

Open data from Great Britain’s Electricity System Operator

Open air quality data

Open low-cost PM2.5 sensor data

Air quality of China

Energy production photovoltaic (PV) energy systems

Hourly usage energy report for Srp customers

Open Data from the UK's largest water and wastewater services company

The Official Carbon Intensity API for Great Britain developed by National Grid

Electricity usage estimations, carbon footprint estimations, and utility data

API to estimate the carbon footprint of loading web pages