Assignment 95
https://www.oica.net/category/emissions/add-on-technology/
https://www.whichcar.com.au/news/what-is-a-petrol-particulate-filter-and-how-does-it-work
https://www.onlyrevo.com/blog/gpf-gasoline-particulate-filter-what-is-it-and-what-does-it-do/
https://www.actachemicamalaysia.com/archives/1acmy2017/1acmy2017-08-12.pdf
https://theicct.org/publications/estimated-cost-gasoline-particulate-filters