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%
63
flagSpain
3%
0%
92%
3%
28
flagItaly
7%
3%
89%
0%
56
flagthe United Arab Emirates
11%
5%
77%
5%
18
flagthe Netherlands
10%
7%
74%
7%
39
flagGermany
15%
5%
73%
5%
156
flagNorway
12%
4%
73%
9%
41
flagPakistan
10%
10%
73%
3%
30
flagIndia
17%
4%
71%
3%
228
flagthe United Kingdom
14%
8%
70%
4%
393
flagthe United States
20%
4%
68%
3%
665
flagUU
26%
5%
67%
0%
34
flagPoland
18%
8%
67%
5%
12433
flagCanada
20%
5%
65%
8%
35
flagAustralia
12%
6%
64%
12%
31
flagSweden
11%
17%
64%
5%
17
flagRepublic of Ireland
35%
0%
53%
10%
28
flagFrance
23%
14%
52%
5%
34
flagthe Philippines
33%
0%
51%
12%
33
flagRussia
5%
22%
44%
27%
18

Gender

men71%
women69%
to protect from frost
14%
18%
to protect from birds
8%
6%
to protect from acid rains
71%
69%
to protect from graffiti makers
5%
4%

Details

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