A lot happened this week in green: from readers in the Hollywood Hills to our writers in Times Square, the International Day of Climate Action brought global awareness for climate change; we found out Chinese fruit bats demonstrate unusual sexual behavior–never before seen in adult animals–discovered a lamp that works only with a drop of blood, and rounded up five

tips for a greener Halloween. Find out what else happened in the world of green this week in our photo roundup of most popular, most important, and most oddball stories. And if you missed it, view last week’s

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The Week in Pictures: International Day of Climate Action, Green Halloween, and More (Slideshow)