There will be many disadvantages for human if animal testing is stopped.
If we check in a dictionary, we see that human can be an adjective and it can be a noun. In this example human is used as a noun.
If we check again in the dictionary, we see that human is a countable noun. In grammar, we know that if we’re talking about all examples of a thing, everywhere, and the thing is countable, then we must add an ‘s’ to the noun:
Mistakes are often made when human is used as a noun modifier, in which case the ‘s’ might be added to the main noun:
Can you identify examples of human used as a noun, and human used as a noun modifier? Add them to the comments below :).