The document summarizes the history of pollution in Montcada, Spain and efforts to clean up the city. It describes how Montcada was once one of the most polluted cities in Spain due to 3 rivers, 6 industrial states, 3 highways, a rail line, and an incinerator. In the 1990s, an environmental group formed to advocate for cleaning up the city. As a result, laws and actions were taken to protect the environment, though Montcada is not fully clean today. A natural park was built alongside one river, and in 2002 a water treatment plant was constructed using a 7 step process to clean Montcada's water.

1. Èlia Canga, Marc Capdevila and Enric Pulido

2. A little bit of history…
 Montcada was for decades one of the most
polluted cities in Spain.
 3 Rivers, 6 industrial states, 3 highways and
railways, an incinerator…

3. La Farge
 It’s an incinerator and an extractor of minerals.
 This polluted the air of our inhabitants.
 But in the 90’s, it was created an environment
group that wanted to clean their city.

4. The fight against the
pollution
 Since this group started to protest about
pollution, lots of laws and actions have been
created and done to protect environment.
 However, Montcada isn’t a clean city nowadays.
 But the city council built a Natural Park aside the
river.

5. The water treatment plant
 It was built in 2002 to clean Montcada’s
water and turn it back to the rivers
afterwards.

6. It uses 7 steps
1.Predebast 2.Debast 3.Desbaranament
and degreasing

7. It uses 7 steps
4.Primary decanter 5.Bioreactor 6.Secondary decanter
7.Reed