

You cannot say no to legitimate interest. That’s a valid legal basis for processing the data that you only need to be informed about. Some times it appears like they are asking for your consent (which is a different legal basis for processing data) for legitimate interest, but that’s likely just a poorly designed interface.
Aluminium smelting is so energy intensive that Iceland, a country with a population of less than 400 000, is the world’s 12th largest producer of it, even though the raw materials aren’t mined there. Iceland just has cheap geothermal and hydroelectric power.