1. Introduction

2. The GLACE Project

3. Observations and data reduction

4. The Catalogue of ELGs

5. Derivation of line fluxes

6. Spatial and redshift distribution of the cluster galaxies

7. Hα+[NII] luminosity function

8. Star-forming galaxies and the AGN population

9. Cluster dynamics from emission line galaxies

10. Summary and Conclusions