India, Aug. 11 -- Donald Trump, President of the United States, announced the imposition of a 15% tariff and a minimum price system on imports of polysilicon and its derivatives, the key input for the manufacturing of solar panels and semiconductors, considering that those foreign purchases represent a threat to national security.

Although the proclamation does not expressly mention China, the decision comes in a context in which the Asian country dominates global polysilicon production, and a large part of the solar panel supply chain.

Polysilicon is the essential raw material for manufacturing solar panels, and is also used in the production of semiconductors.

The White House stated that the measure seeks to reduce dependence on fore...