Africa Water, Sanitation & Hygiene Africa Water, Sanitation & Hygiene Magazine Ma | Page 25

water & energy 22.03.2014

Waterborne transportation
Waterborne transit is one of the most energy efficient. Inland towing
barges are more than 3 times more energy efficient than road trucks and
40% more efficient than rail.

Biogas produced from sewage
In Stockholm, public buses, waste collection trucks and taxis run on
biogas produced from sewage treatment plants.

Access to water and sanitation
In 2011, 768 million people did not use an improved source of drinkingwater and 2.5 billion people did not use improved sanitation.

Access to electricity
More than 1.3 billion people still lack access to electricity, and roughly 2.6
billion use solid fuels (mainly biomass) for cooking.

Wind power
Wind power is the most sustainable source of renewable energy, mainly
because of its low greenhouse gas emissions and water consumption.