Tag Archives: Jujuan

Kenya joins global network tracking pollution to save ozone layer UN

The Nairobi Validation Station, the first of its kind in tropical and sub-tropical Africa, has been installed within the grounds of the UN Environmental Programme (UNEP) at Gigiri. The agency, which is involved in the work, said the station would detect ozone, emitted from the East African part of the tropics and formed from sources such as industry, transport, agriculture forest fires and charcoal burning. When the station was inaugurated today, UNEP Executive Director Klaus Toepfer called ozone a “curious chemical,” noting that in the upper atmosphere, it acts as a shield, protecting life on Earth from damaging levels of solar radiation. “In the lower atmosphere, known as the troposphere, small amounts are helpful, acting as a detergent to clean the air,” he added. “But high amounts, formed by sunlight mixing with human-made pollution from cars, factories and other sources, can be harmful, Mr. Toepfer said. “These smogs – increasingly a phenomenon in developing as well as developed countries – can prove fatal for vulnerable people such as those with heart conditions and asthma, and can also damage car tires, electricity cables and crops.” One of the key roles of the new station is to help unravel the fate of ozone damaging chemicals produced in the region from both human-made and natural sources such as vegetation. Scientists are unsure as to how much of this pollution makes its way into the upper atmosphere and how much remains closer to the ground. Understanding this is crucial to knowing how quickly the ozone layer may recover after decades of destruction by substances such as chlorofluorocarbons (CFCs). Once in the upper atmosphere, ozone-damaging chemicals can travel north and south towards the poles where, in the colder conditions, the layer is at highest risk. read more

New KS Potash and Vale work awarded to Aecon Mining

first_imgAecon Group Inc has been awarded two contracts valued at approximately C$110 million for work in Aecon’s Mining segment. Aecon has been awarded a contract by K+S Potash Canada for additional work on their Legacy mining project in Saskatchewan. The scope of work awarded includes installation of process mechanical equipment, piping, electrical and instrumentation systems for the storage load-out building. Work will begin in the second quarter of 2015 and is expected to be complete in the second quarter of 2016.This new contract is in addition to work previously awarded to Aecon by K+S Potash Canada for mechanical, piping, electrical and instrumentation systems for the North Tank Farm and for the Evaporator, Crystallisation and Clarifier Plant portion of the Legacy project. Under the terms of the second contract, Aecon will perform general site services at Vale Newfoundland & Labrador Ltd’s Long Harbour processing plant. Work commenced in the first quarter of 2015 and is expected to be complete in the first quarter of 2016.“Aecon’s Mining segment continues to build on its strong backlog of work with these two important contracts,” says Teri McKibbon, President and CEO, Aecon Group Inc. “We are pleased to continue our work with K+S Potash Canada and Vale Newfoundland & Labrador Limited – both leaders in their respective industries.”last_img read more