1. https://public.wmo.int/en/media/press-release/state-of-climate-2021-extreme-events-and-major-impacts.
2. https://www.worldcement.com/events/cembureau-cementing-europes-future/.
3. https://www.usgs.gov/centers/national-minerals-information-center/mineral-commodity-summaries.
4. https://www.statista.com/statistics/494922/co2-emissions-fuel-combustion-cement-production-united-kingdom-uk/.
5. Clean production and properties of geopolymer concrete; a review;Amran;J. Clean. Prod.,2020