# global dimming

> gradual reduction in the amount of global direct irradiance at the Earth's surface; approx. 4% reduction over 1960–1990; caused by an increase in atmospheric particulates (e.g. sulfate aerosols) due to human action

**Wikidata**: [Q211627](https://www.wikidata.org/wiki/Q211627)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Global_dimming)  
**Source**: https://4ort.xyz/entity/global-dimming


## References

1. Freebase Data Dumps. 2013