(a)[4]
State four sources of water pollution other than raw sewage.
(b)[3]
Outline the stages in treating raw sewage that make it safe to return to the environment.
(c)[1]
Define the term pathogen.
Biology 0610 · IGCSE · Pollution
Pollution — practice question
Fig. 7.1 comes from a newspaper article on pollution called 'How safe is your water?'.