In a move to address the pollution caused by houseboats, the government has decided to introduce a mobile sewage treatment plant in the Vembanad lake.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/vembanad-get-mobile-sewage-treatment-plant
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-thiruvananthapuram
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kerala
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lake
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vembanad
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sewage-treatment-plants-stp