2 DATA AND SELECTION CRITERIA
2.1 Sloan Digital Sky Survey
2.2 Additional multi-wavelength datasets
2.3 Classifications and volume-limited sample
3 ENVIRONMENTAL PARAMETERS
3.1 Local density indicators
3.2 Close pair fraction
4 RESULTS
4.1 Local density
4.2 Median local luminosity density and the local colour
4.3 Close pair
4.4 Multi-wavelength detection and environments
5 DISCUSSION
5.1 Red Early-type Galaxies
5.2 Blue Early-type Galaxies
5.3 Red Late-type Galaxies
5.4 Blue Late-type Galaxies
5.5 Comparison in a given spectral class
6 CONCLUSIONS