Greenhouse gas (GHG) monitoring and air quality assessment are essential for addressing climate change and mitigating public health risks associated with pollution in urban and industrial environments. Earth observation satellites such as CO2M and CHIME provide detailed measurements of emissions, atmospheric composition, and air‑pollutant dispersion. These observations support evidence‑based policy implementation, emission reduction strategies, regulatory monitoring, and improved air‑quality forecasting, contributing to better protection of human health and the environment.