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Op-Eds and Essays






  • “Water for Life” Nature Conservancy Magazine, Summer 2017

  • “Water for people or nature is a false choice. We need to think bigger to protect the world’s water.” World Economic Forum, Jul 11, 2017

  • “This is the impact that hydropower could have on a low carbon future” World Economic Forum, May 12, 2017

  • “Energy, Economics, and the Environment” Project Syndicate, May 8, 2017

  • “The Geopolitics of Environmental Challenges” Project Syndicate, Mar 2, 2017

  • Environmental and natural resource security for the 21st century with J. C. Castilla-Rubio, Financial Times, Jan 16, 2017


  • Driving Sustainable Water Management with Market-based Solutions Huffington Post, Aug 24, 2016

  • “Lessons on Fish Migration Crucial for Protecting Communities, Livelihoods and Food” with Maria Damanaki, Huffington Post, May 23, 2016

  • “Water and Climate Change” Huffington Post, Apr 27, 2016

  • “Climate Change+Population Growth+Economic Expansion=More Severe Flooding” EcoWatch, Apr 6, 2016


  • “Nature Crucial to Combatting Impact of Climate Change on Water” Huffington Post, Dec 14, 2015

  • “COP21 Offers an Opportunity to Integrate Water, Climate and Human Development” with G. White, Huffington Post, Nov 30, 2015

  • Not all types of water projects should be considered green Environmental Finance, Oct 23, 2015

  • One in four major cities won’t be able to provide clean water to residents Guardian, Sep 11, 2015

  • “Will 2015 be the turning point for water scarcity?” World Economic Forum, Mar 24, 2015

  • “Three Key Lessons from São Paulo’s Water Crisis” with Mark Tercek, Huffington Post, Mar 19, 2015

  • “Why we need to address global water security now.” with G. White – World Economic Forum, 2015


  • “How to help cities save water” World Economic Forum, Dec 4, 2014

  • “Making Water Conservation Pay” Project Syndicate, Dec 4, 2014

  • “Cities should look to nature to bridge investment gap in water sector” Guardian, Nov 18, 2014

  • “Solutions to the water energy nexus remain elusive” Guardian, Sep 10, 2014

  • “What one piece of advice would you give the UN on water” with Mike Muller, Betsy Otto, Greg Koch, Kitty van der Heijden, Jenny Grönwall, Chris Brown, Guardian, Mar 22, 2014

  • “How will hydropower shape Africa’s future?” World Economic Forum, May 6, 2014

  • “Water Security in an Unpredictable World” Live Science, Feb 26, 2014

  • “Scaling Up Water Sustainability” Project Syndicate, Jan 15, 2014

2013 and earlier

  • “NGO recruiters are missing a trick by overlooking expert talent” Guardian, Nov 22, 2013

  • “It’s a mistake for NGOs not to engage with hydropower companies” Guardian, Aug 19, 2013

  • “Financing water: how public-private partnerships can solve challenges” Guardian, Jul 23, 2013

  • “We know how to solve water scarcity, but we are failing to fund solutions” Guardian, July 18, 2013

  • “Nature’s Silent Currency” Huffington Post, Mar 25, 2013

  • “The Business Opportunity in Water Conservation” with M. Grobbel, M. Stuchtey, McKinsey Quarterly, Jan 2010

  • “How IT can cut carbon emissions” with M. Löffler, J.M. Oppenheimer McKinsey Quarterly, Oct 2000

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