30 Meters
20 meters
10 meters
50 meters
Pyrometer
Pyroscope
Seismograph
Xylometer
1991
2011
2001
Vatican City
Afghanistan
North Korea
Vietnam
London
Tokyo
Doha
Beijing
Berlin
Moscow
New York
Malaysia
Singapore
Thailand
Indonesia
Relative humidity
Purity of milk
Specific gravity of liquid
None of these.
Sox
SOx
Suspended particulate matter
CO
35 years
40 years
30 years
25 years