The steel mill in a partially occupied region of Ukraine is a dystopian maze of flames, chutes and tentacled pipes, vast enough to be a small city. Thunderous blazes of sparks flash above the open furnaces where workers smelt iron ore into streams of molten metal day and night.

The European Union has vowed to take firm and proportionate countermeasures in response to U.S. President Donald Trump’s imposition of tariffs on all steel and aluminum imports.

President Trump plans to impose fresh tariffs on all aluminum and steel imports, seeking to curb China’s growing dominance in global trade. These six charts show the tariffs’ potential economic