Ricardo, a global strategic, environmental, and engineering consulting company, completed the acquisition of Aither, a water-and-natural-resources advisory consultancy, for £17m. "The market for Aither's services is growing rapidly given the scale of water and natural-resources challenges globally, which is increasing recognition of the need for specialist economics, policy and strategic advice. With the acquisition of Aither, we will be able to expand our capabilities across the entire water value chain, as well as in natural resources, climate resilience and adaption - allowing Ricardo to serve a greater range of our clients' needs globally," Graham Ritchie, Ricardo CEO.