Irish eyes would smile over the green and blues of this true-color satellite image taken by NASA Aqua MODIS instrument on Aug. 7, 2003. One of the biggest issues facing this island nation is a struggle to maintain a clean supply of freshwater. The country is known worldwide for its green rolling hills made possible by abundant rainfall.

 

But it’s because of this rainfall that waterways are often polluted from insufficient wastewater treatment, as well as nitrogen and phosphorus-rich runoff from farms. National Geographic reports that officials are taking action in Ireland, including installing wireless pollution detectors in some rivers.