Since 1998, Harvard University wraps marble statues on its campus with waterproof covers every winter. Why?

to protect from frost
to protect from birds
to protect from acid rains
to protect from graffiti makers
The eastern third of the United States is sig­nif­i­cant­ly impacted by acid rain. Acids in the rain react with the calcium com­pounds in the stones like lime­stone or marble to create gypsum, which then flakes off.

Answers distribution

to protect from frost
to protect from birds
to protect from acid rains
to protect from graffiti makers
answers
flagFinland
1%
0%
98%
0%
91
flagSpain
4%
2%
91%
2%
48
flagItaly
8%
2%
88%
0%
102
flagthe Netherlands
5%
4%
84%
5%
138
flagSweden
8%
4%
84%
2%
73
flagSwitzerland
11%
5%
83%
0%
71
flagthe United Arab Emirates
6%
3%
83%
6%
62
flagthe United Kingdom
13%
6%
74%
4%
763
flagPakistan
14%
5%
74%
3%
55
flagGermany
13%
7%
72%
5%
339
flagthe United States
19%
3%
70%
3%
899
flagIndia
18%
4%
70%
3%
331
flagRepublic of Ireland
19%
4%
70%
5%
72
flagNorway
13%
7%
69%
9%
52
flagPoland
17%
7%
68%
5%
24932
flagFrance
18%
8%
66%
5%
60
flagCanada
18%
8%
64%
8%
48
flagRussia
11%
8%
61%
16%
60
flagUkraine
20%
13%
53%
10%
58
flagUnknown
27%
10%
52%
8%
1356

Gender

men66%
women73%
to protect from frost
18%
16%
to protect from birds
8%
5%
to protect from acid rains
66%
73%
to protect from graffiti makers
6%
4%

Details

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