An international team of scientists including Mark Williams and Jan Zalasiewicz of the Geology Department of the University of Leicester, and led by Dr. Thijs Vandenbroucke, formerly of Leicester and now at the University of Lille 1 (France), has reconstructed the Earth's climate belts of the late Ordovician Period, between 460 and 445 million years ago.

KTDA has identified 16 sites for setting up hydropower plants with a potential of producing 28.33 megawatts when completed.

The Kenya Tea Development Agency (KTDA) plans to spend Sh5 billion in setting up hydro power plants.

Engineers in the US are using rocket-thruster technology to create a self-powered sewage treatment process that also reduces greenhouse gas emissions.

Using microbes to break down sewage produces nitrous oxide and methane,