Overview
- The Nature paper published Wednesday mapped artificial light changes from 2014 to 2022 using more than one million nightly images from VIIRS satellites processed by NASA.
- Researchers saw the fastest brightening in sub‑Saharan Africa and Southeast Asia, driven by urban growth, new infrastructure, and wider access to electricity.
- Europe recorded a 4% decline in satellite‑measured night radiance, with France down about 33% as many towns switch off late‑night streetlights to save energy and curb light pollution.
- Conflict and economic breakdown caused sharp dimming in places such as Ukraine, Syria, Yemen, Afghanistan, Lebanon, and Venezuela as grids failed and cities went dark.
- The satellite’s sensor undercounts blue‑rich LED light, so some LED upgrades look like dimming from space, and scientists are now backing a dedicated European mission to capture night lights with better sensitivity and resolution.