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
flagItaly
8%
2%
88%
0%
104
flagAustria
3%
3%
87%
5%
54
flagthe Netherlands
5%
3%
85%
5%
151
flagSwitzerland
10%
5%
84%
0%
79
flagSweden
9%
3%
84%
2%
77
flagthe United Arab Emirates
6%
3%
84%
6%
64
flagthe United Kingdom
13%
6%
74%
4%
789
flagGermany
13%
7%
73%
5%
356
flagIndia
17%
4%
72%
4%
396
flagPakistan
15%
6%
72%
3%
58
flagthe United States
20%
3%
70%
3%
964
flagNorway
13%
7%
69%
9%
52
flagPoland
17%
7%
68%
5%
26228
flagRepublic of Ireland
20%
4%
68%
8%
75
flagFrance
18%
8%
66%
5%
60
flagCanada
18%
9%
64%
7%
54
flagRussia
13%
12%
58%
14%
75
flagUnknown
26%
10%
53%
9%
1395
flagUkraine
17%
17%
53%
10%
76

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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