Transport for London has escalated its battle against air pollution, launching a case worth up to £1 billion against carmakers who allegedly allowed polluting diesel vehicles to enter the Ultra Low Emission Zone without paying required fees.

The bold legal action highlights how cities worldwide are using enforcement mechanisms to tackle vehicle emissions and protect public health. TfL's case argues that carmakers have failed to comply with clean air zone regulations designed to reduce harmful pollutants in London's streets. Read the full story →

Today's takeaway: When cities take legal action, even the biggest industries can be held accountable for environmental damage.