Not normally.The term Immigration would only be capitalized if it was the first word in a sentence or part of the name of an organization such as UK Visas and Immigration in Britain, Department of Immigration and Border Protection (DIBP) in Australia, or U.S. Citizenship and Immigration Services (USCIS) in the USA
No, seasons are not capitalized.
"Can" is typically not capitalized in sentences unless it is the first word or part of a proper noun.
Yes, "Spring 2009" should be capitalized because it is a specific season and year.
No it's not capitalized.
No, keywords do not have to be capitalized.
No it shouldn't be capitalized.
Wikipedia is capitalized.
No, it is not capitalized.
to stop Immigration
Immigration
decreased Immigration