Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Volume 2 Issue 9, September 2019

Floating wetlands for wastewater treatment

Floating treatment wetlands, pictured, can cost-effectively improve wastewater treatment in stabilization ponds. In a three-year study, Afzal et al. evaluated the performance of full-scale floating treatment wetlands in stabilization ponds receiving mixed sewage and industrial wastewater, and they demonstrated substantial improvement in all water quality parameters recorded.

See Afzal et al.

Image: Muhammad Afzal, National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan. Cover Design: David Shand.


  • The UN General Assembly will meet later this month at the UN headquarters in New York to adopt a political declaration pledging to accelerate efforts to meet the Sustainable Development Goals by 2030.



Top of page ⤴

Comment & Opinion

  • Transnational environmental crime has become the largest financial driver of social conflict, with severe implications for peace and security. Sustainable-development frameworks need to overtly recognize and mitigate the risks posed by transnational environmental crime to environmental security.

    • Meredith L. Gore
    • Patrick Braszak
    • Rob White
Top of page ⤴

Research Highlights

Top of page ⤴

News & Views

  • Animal movements are essential to the economic health of livestock production, but are also a threat to it by promoting disease spread. New research suggests a way towards obtaining an appropriate balance between both aspects in the design of control policies.

    • Guillaume Fournié
    • Dirk U. Pfeiffer
    News & Views
  • Natural disasters affect supply chains in complex ways that traditional economic models at the sector level cannot capture. An agent-based model representing firm-to-firm interactions demonstrates that these interactions magnify the economic cost of disasters.

    • Stephane Hallegatte
    News & Views
  • Co-locating solar panels and crops reduces competition for land between energy and food production. In addition, these agrivoltaic systems create positive synergistic relationships between crops and solar panels.

    • Hélène Marrou
    News & Views
  • Dam removal is becoming an increasingly common tool to restore rivers. What would it take to replace lost electricity from removed hydroelectric dams with solar power?

    • Jeffrey J. Duda
    News & Views
Top of page ⤴


  • Record-breaking fire seasons are becoming the new normal, prompting calls for land management and policy reforms. This Perspective clarifies different types of resilience to wildfire to prioritize efforts to better coexist with increasingly fire-prone conditions.

    • David B. McWethy
    • Tania Schoennagel
    • Crystal Kolden
Top of page ⤴


Top of page ⤴

Amendments & Corrections

Top of page ⤴


Quick links