The technology exists for diesel engines to meet emissions regulations. However, German car-makers secretly formed an agreement not to use certain emissions red

The technology exists for diesel engines to meet emissions regulations. However, German car-makers secretly formed an agreement not to use certain emissions reduction technologies (such as large, refillable AdBlue tanks) in order to save money: https://www.theverge.com/2017/7/24/16021292/german-car-companies-cartel-diesel-emissions-90s https://www.theverge.com/2017/7/24/16021292/german-car-compa...