With funding from the international Green Climate Fund, Karachi will launch a zero-emission Green Bus Rapid Transit (BRT) network, with 200 buses fuelled by bio-methane.

The cheap, clean bus network will cater for 320,000 passengers daily, and will reduce planet-warming emissions by 2.6 million tonnes of carbon dioxide equivalent over 30 years, according to project documents.

The Green Climate Fund, set up under U.N. climate talks to provide finance to developing countries to help them grow cleanly and adapt to a warming climate, will provide $49 million for the Karachi project out of a total cost of $583.5 million.