Four Sno-Isle libraries — Clinton, Langley, Freeland and Coupeville — recently earned the “Green Seal” from the Sustainable Whidbey Coalition.

The four libraries have joined the Oak Harbor Library in earning the distinction, and now all five Whidbey Island libraries have been certified green.

Highlights from the Whidbey Green Seal application checklist showed that Sno-Isle scored high in the categories of transportation and waste and toxic pollution.

The libraries were recognized for taking a leadership role in Whidbey Island’s sustainable efforts by making smart choices to conserve resources, minimize unnecessary driving, reduce waste and toxic pollution, invest in the community, and make purchases closer to home.

Sno-Isle officials said the efficient use of transportation by the libraries has reduced carbon emissions, and conscientious recycling of paper, cardboard, plastics and metals have also reduced waste.

The Freeland and Coupeville libraries have also both installed low impact development rain gardens to minimize stormwater run-off. The Coupeville Library also has solar panels that generate renewable energy.