4 major world cities just agreed to get rid of diesel engines

Paris, Madrid, Athens, and Mexico City will ban diesel engines by 2025, mayors of the four major world cities announced this week. The announcement came as part of the biennial C40 conference. Cities have become major catalysts for addressing climate change, and through the C40 Cities Climate Leadership Group — a global initiative that brings cities together to plan and share best practices — thousands of climate actions have taken place....
https://thinkprogress.org/diesel-ban-cities-8124d0834b7e#.ibwvtfvva