Would you please clarify for me what would be the difference in meaning between the following phrases?
- different climate at either side of the mountain
- different climate at either sides of the mountain
- different climates at either side of the mountain
- different climates at either sides of the mountain
I am confused because of two reasons. First, since either can be both a pronoun and a determiner. Second, since I expect actually two different climates, but at the same time, climates can be used as a collective or abstract noun.