Reforestation is a big part of the world's efforts to curb global warming, but a new study finds it isn’t just the number of trees that makes the difference for the earth, it’s where you plant them. Plus: in Surrey, British Columbia, a cat named Louis is flaunting international law and convention by crossing the US-Canada border to chase mice.

Not every forest cools the Earth (ETH Zurich)

Cat keeps crossing the U.S.-Canada border (CTV News via YouTube)

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