What is "347 (Audio): Public media must not lie. Battery bestiary. Green walls. Hunger ⬇️" about?

Q: What is "347 (Audio): Public media must not lie. Battery bestiary. Green walls. Hunger ⬇️" about?

This week: two great green walls — one in China, one in Africa — slowly learning to hold back the desert after decades of failure. Hungary's state broadcaster apologising, on air, for lying. The world's fastest spider, clocked with a paintbrush.

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This week: two great green walls &#8212; one in China, one in Africa &#8212; slowly learning to hold back the desert after decades of failure. Hungary's state broadcaster apologising, on air, for lying. The world's fastest spider, clocked with a paintbrush.