1. the ecology 1 club

2. the ecology club 1

(The name is one of the club names. Which one is correct? are both OK?
Is there any difference between them?)

3 answers

We don't usually use numbers in club names, so I don't know what these numbers represent.

The one that sounds best (or most closely American) to me is the Ecology 1 Club.
1. the ecology 1 club
2. the ecology club 1

There are many people, so when one club is separated into two clubs, we can name this way: the ecology club 1, the ecology club 2....

Which expression do I ahve to use?
In that case, the better term would be Ecology Club 1.

Thanks for clarifying it. :-)