reporter: pastor romo kirjito is pleased that the many training courses and discussions have changed the village. pastor kirjito: people should love water. treasuring it, being aware of it, treating it creatively is all part of loving water. and when we love something we have a positive attitude towards it. it doesn't matter if it's rainwater or comes from a well, we should value it. reporter: valuing water would certainly go a long way towards ensuring that fure generaons in bunder and other indonesian villages will have access to a healthy water supply. host: there are more than 30 mega cities on our planet, each with more than 10 million residents. and their number is rising. by 2030, around 60% of the global population will likely live in cities. but as urban areas get bigger, their infrastructure is struggling to keep up. new development projects in egypt's capital cairo are ignoring the needs of local residents. reporter: his home is cairo's necropolis, which locals call the city of the dead. what look like small houses are actually old mausoleums. ramy grew up here. affordable