This is from my class essay...
...this is actually true because illegal immigrants contribute to the American economy by working for lower wages and by paying taxes.
But, although illegal immigrants and their children are bringing benefits to this nation’s economical status, tax dollars should not be used to educate, provide medical services to, or welfare for illegal immigrants because it causes legal citizens to pay extra money, and the funds must be used for exclusively legal citizenship
holders....
my instructor marked as wrong in "But, although". I don't see what's the problem in using "but" and "altohough" together, and not sure how to make it correct. i tried to leave out the 'but', then it seems my ideas doesn't connected each other. what will be the best way to fix this error??