From here, our next stop is the least densely populated country on Earth. Mongolia Canada Sweden Greenland Welcome to the freezing vistas of Greenland. From here we are going to visit the largest desert in the world. Sahara Desert Antarctic Desert Arctic Desert Gobi Desert Congrats!
They are all greenhouse gasses They are all harmless to breathe They are all man-made gases They are all noble gases What do Albert Einstein, Bob Dylan and Bill Clinton have in common?
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