The video discusses the environmental and health impacts of diesel vehicles compared to petrol cars. While diesel engines produce less carbon dioxide, they emit more harmful gases and particles. The video highlights the health issues faced by families living near high traffic areas and the policy measures being taken, such as increased parking permit costs for diesel vehicles in Islington. It also addresses the advancements in diesel technology, which have significantly reduced emissions, and the upcoming stricter European emission standards for all new cars.

What changes have been observed in diesel emissions over the last two decades?

What are the new European standards for emissions that will affect all new cars?