Answer:
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The world's tallest artificial structure is the 829.8-meter-tall (2,722 ft) Burj Khalifa<span> in Dubai. The building gained the official title of "Tallest Building in the World" and the tallest self-supported structure at its opening on January 9, 2010.</span>
Explanation: all the continents on Planet,'Earth':
1. Africa,
2.south America,
3.Antarctica,
4. Asia,
5.Australia,
6. Europe.
7.north America
I see it too and i need help too