I would think the following is correct:<br/><br/>2 million tons of Aluminium <u>is</u> produced in this plant.<br/><br/>and the following is wrong:<br/><br/>2 million tons of Aluminium <u>are</u> produced in this plant.<br/><br/>Is it because Aluminium is an uncountable noun and uncountable nouns are always singular. Thanks for your reply.