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%
90
flagSpain
4%
2%
91%
2%
48
flagItaly
8%
2%
88%
0%
102
flagSwitzerland
9%
4%
86%
0%
44
flagthe Netherlands
5%
4%
84%
4%
124
flagthe United Arab Emirates
6%
3%
82%
6%
58
flagSweden
11%
5%
81%
1%
53
flagPakistan
10%
6%
77%
4%
48
flagthe United Kingdom
12%
6%
75%
4%
742
flagGermany
14%
7%
72%
4%
313
flagthe United States
19%
3%
70%
3%
859
flagIndia
18%
4%
70%
3%
316
flagNorway
13%
7%
69%
9%
52
flagPoland
17%
7%
68%
5%
23549
flagRepublic of Ireland
20%
4%
68%
6%
64
flagFrance
18%
8%
65%
5%
58
flagCanada
19%
8%
63%
8%
47
flagUkraine
20%
14%
55%
7%
54
flagRussia
11%
11%
53%
22%
45
flagUnknown
27%
10%
52%
9%
1320

Gender

men66%
women72%
to protect from frost
18%
16%
to protect from birds
8%
5%
to protect from acid rains
66%
72%
to protect from graffiti makers
6%
4%

Details

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