The following link is to a ten year old video (circa 7 minutes) of a tour and talk by Denny Larson (Global Monitor and leader of the Bucket Brigade Movement) when he visited Gibraltar.
http://www.youtube.com/watch?v=0kHkSkcOiNk&feature=youtu.be

There are several links on this website to the work undertaken by the Bay Bucket Brigade made up of NGO’s from both sides of the border and coordinated by the ESG and funded by Hassans and other members of the community.
Have a look – the visible pollution is frightening especially as the backdrop to the young child in the playground in the heart of the industrial complex in the campo area.