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85 Amy09-11-19

Everything is never-ending change in the universe, global warming just one of the variational representation. Maybe it's exaggerated. Because the changing beyound human's ability.
84 Satony09-11-17

the enlarging population!!!
83 roy09-11-17

human beings have respilities to protect the envirmont .cause we just have one and only world.
82 TMO09-11-16

that is a wonderful quiz, helping people better understand climate change..
81 鍑屼簯09-11-14

Fossil fuel burning and oil burning are the leading cause. no.
80 Simon09-11-14

Waste gas emission by humanity activity. Of course not, I think the effect of global warming will become more and more serious.
79 Evan09-11-14

The main cause is undoubtably humans' activities. People have done a lot damage to nature in persuing industry development. I do not think the seriousness is exaggerated, as much evidence has been showed by scientists.
78 happiness09-11-13

the quiz is interesting.I learn some from it . but i think it too common .maybe some questions about how carbon dioxide and some other greenhouse gases affect the whole climate .because more carbon dioxide does not always mean "warmer".we should treat it objectively.
77 zhou09-11-13

I think the primary cause of global warming is the Human activity. But we have no idea to stop it , as we all known, Human activity can`t be avoided which is necessary. We can`t deny the fact that the global warming causes more serious prombles to human beings, so I don`t think it is exaggerated, on the contrary,we should place weight on it .
76 ivyhike09-11-13

I think the quiz is very interesting. Most of the questions is familiar to me, and some are really unknown to me. So I can learn something from the quize.The global warming is really a problem now, especially to the developing countries. PS: I think the error message is cute. I hope that the quize can have a chinese one to be more accessible to more people.

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