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With the holiday season in full swing, it seems only right to focus this month’s attention on Green Walls and Good News. It has been a European tradition to bring trees inside the house at this time of year, to celebrate the “yule” and give reverence for the bounty and evergreen of trees.

So, some good news on our beleaguered environmental front: green walls are becoming more popular as a way to absorb more CO2 emissions.

There is an initiative called the Great Green Wall in Africa, which is halting desertification and poverty near the Sahara. More than 20 African countries have joined together in an international mission to plant a massive wall of trees running across the continent. That’s good news.

Green walls of all sorts act as carbon sponges, which helps mitigate climate change.

Check out green walls for yourself.