id	keyword
essd-1136	waste
essd-1136	environmental
essd-1136	businesses
essd-1136	south
essd-1136	africa
essd-1136	management
essd-1136	sector
essd-1136	pollution
essd-1136	municipality
essd-1136	motor
essd-1136	study
essd-1136	south africa
essd-1136	owners
essd-1136	development
essd-1136	operations