Perth's water worries: how one of the driest cities is fighting climate change

From locating leaky pipes with acoustic listening to reusing wastewater, Western Australia's capital is using technology to bridge the water gap

Perth, the capital of Western Australia, is not only one of the most isolated cities in the world, it is also becoming one of the driest in Australia.

Since the gold rush of the 1890s, impressive engineering schemes have transported enough water to make Perth a city of lush lawns and eye-catching flowerbeds, to the surprise of some visitors.