The "Polluted Rivers" theme encourages students to research efforts to keep their river-water clean, drinking water, sewerage, pollution and how these issues have changed over time. Rivers that have been 'lost' or covered over are also included under this theme.
The artwork below is from Rivers of the World 2008. The featured rivers (and partnered cities) were:
- River Capibaribe (Recife, Brazil)
- River Tiete (Sao Paulo, Brazil)
- River Huangpu / Suzhou Creek (Shanghai, China)
- River Nile (Cairo, Egypt)
- River Hooghly (Kolkata, India)
- river Papaloapan (State of Veracruz, Mexico)
- River Liesbeek (Cape Town, South Africa)
- River Thames (London, UK)
- River Capibaribe (Recife, Brazil)
- River Tiete (Sao Paulo, Brazil)
- River Huangpu / Suzhou Creek (Shanghai, China)
- River Nile (Cairo, Egypt)
- River Hooghly (Kolkata, India)
- river Papaloapan (State of Veracruz, Mexico)
- River Liesbeek (Cape Town, South Africa)
- River Thames (London, UK)
