As we drive through Malawi, every town and village is an explosion of colour, sounds and smells, each place a sensory experience in its own right, in complete contrast to long distance vision which seems to be perpetually blighted by the dense haze hanging in the air and blocking out the long view. We had worked out for ourselves that the haze is a combination of red dust carried by the wind coupled with smoke from extensive burning of scrub, but, now that we’re travelling further south and the haze is thinning, we realise that water vapour from the great lake is the third element helping to create the mist.…