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?
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! You've made it to the second break. Let's have some dinner before we go on.
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