1. https://www.lenzen-gruppe.de/en/
2. https://www.marketline.com/overview/our-offering/industry-profiles/
3. https://www.ilo.org/global/topics/geip/WCMS_614394/lang--en/index.htm
4. https://www.bbc.com/news/world-asia-24910835
5. https://www.theconnectere.com
6. https://www.epa.gov