1. As one of the inorganic toxicity in groundwater which is mostly used for drinking water, identify possible sources of Nitrate contamination and suggest how to avoid or prevent the leaching of Nitrate from those sources?
2. Could it be possible to have toxic inorganic or organic compounds contaminating in groundwater due to the leachate of greywater from toilets? Explain that incidence.
3. If your country recognize problems of human health effects due to PPCP contaminations, suggest the possible methods for improvement in relation to sanitation systems.