dirt...

As I move from city to city, I realise that each city has its own unique brand of dirt....

Amman - desert sand that used to blow in through window frame cracks and under door ways and coat surfaces in a fine, grainy yellow/orange layer...unless it was during a sandstorm in which case you would come home and find a thick layer and a veritable dune blocking the front door!

Hong Kong - in a word...."mould"...growing on walls, on clothes, on handbags...

Manila - the pollution is actually tangible, it covers everything in a thick, black greasy layer of dirt - electrical appliances, floors, window frames, furniture....and it never seems to come off completely....