What type of toilets are the most suitable for an area where water supply is limited ?

What type of toilets are used in aeroplanes?

What type of mirror is most suitable as shaving glass?

What type of toilets are most suitable for holding an outdoor music festival in a park ?

What kind of soil is most suitable for plant growth? Why?

Some of the alternative sewage disposal systems for human waste are given below : Chemical toilets, Composting toilets, vacuum toilets, Septic tank toilets, Vermi-processing toilets Which of these toilets are used where water supply is limited or not availabe at all?

What type of water forms scum with soap?

which of the following are used for the safe disposal of human excreta in those areas where sewerage system dose not exist and water supply is limited or not available at all ?