We hope you have a happy, inspiring World Water Day! Remember to apply to the 2016 RELX Group Environmental Challenge by 2 May 2016 for the chance to win $50,000 for your water and/or sanitation project.

The RELX Group Environmental Challenge is awarded to projects that best demonstrate how they can provide sustainable access to safe water where it is presently at risk and/or access to improved sanitation. Projects must have clear practical applicability, address identified need, and advance related issues such as health, education, or human rights.

If you need inspiration, watch how the 2011 winner has helped with arsenic removal and the 2015 winner is bringing water to communities at high elevation. And check out RELX Group's partner’s relevant information at the Guardian’s Global Development Professionals Network.

The RELX Group Environmental Challenge is powered by Skild.