85% of emissions impact comes from their production
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/smartphone-tech-most-damaging-environment
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/thesaurus/mobile-phone
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmental-health
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/telecommunication
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmental-security
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment