In case you missed it, yesterday, March 22, was World Water Day. The United Nations designated this day in 1993 to raise awareness of water issues around globe. A different theme is focused on each year, and in 2011, it’s Water for cities, responding to the urban challenge. The goal is ”… to spotlight and encourage governments, organizations, communities, and individuals to actively engage in addressing the challenges of urban water management.”

While the official World Water Day site can be found here, I put together five resources for more learning about water issues. Happy learning:

- The Freakonomics blog discusses a simple “nudge” that can dramatically increase the frequency in which people in Ghana treat their water.

- Forbes magazine blogs on the need for innovative water technology, particularly in heading off water shortages in urban areas.

- Joseph Bergen put together an amazing interactive map that allows you to compare water statistics between any two countries around the world.

- Don’t have much time? Take a look at charity: water’s brief interactive on how water changes everything. When you’re done there, have fun playing with their projects page.

- Decided that you want to get involved? Huffington Post has some great suggestions on organizations that promote clean, safe water to support.