Loughborough University (UK) claims it has made a new system for reducing, and possibly eliminating, dangerous NOx emissions from diesel engines.
Their ACCT system improves existing SCR / Adblue based systems to also work with a cold engine.
http://autoweek.com/article/diesel/d...x-its-possible
http://www.lboro.ac.uk/enterprise/acct/
Cheers,