Demand for air conditioning is booming -- along with its electricity needs. Can antiquity provide low-energy alternatives?

A South African company is farming millions of flies as a food source for industrial fish producers.

EcoLoo is a toilet that cuts the need for water and turns human waste into organic fertilizer.

In the UAE, BluePhin Technologies is collecting waterborne waste with a robot fish packed with AI.

Singaporean technology is turning food waste into biodegradable plastic wrap.

In 2015 the garbage epidemic in Beirut made headline news. While the city was drowning in trash one man came up with an idea to creatively transform glass waste into stylish and elegant glassware and save an ancient industry at the same time.

Since 1986 Nairobi's population has doubled -- struggling with traffic, pollution and waste, but even in the face of adversity there are champions of green living committed to building a greener future for city dwellers everywhere.

Environmentalist Sherif Hosny has set up a sustainable living company, bringing hydroponic urban farms to Cairo's rooftops, hoping to make the congested capital a greener place to live whilst empowering the community at the same time.

The landscape architect creating some of Singapore's most iconic green walls and rooftop gardens.

Apeel Sciences uses plant materials to create a thin barrier for fruit and veg to stave off spoilage.

Abdul Muqeet is championing a new type of carrier bag made from old newspapers.

Marine scientist Kerry Sink is leading the charge to protect South Africa's unique marine life.

Daniel Raven-Ellison plans to make London the first urban national park in the world.

How Kenyan coffee farmer Zeddy Rotich uses cow dung to power her biogas stove.