The San Salvador Volcano is a stratovolcano situated ...
A chemical that is toxic to microrganisms. Biocides are ...
Manusela National Park, covering an area of 189,000 ...
Seismometers are instruments that measure motions of the ...
Scotch thistle is a biennial plant with thorny leaves, ...
Originated in Sydney in 2007, Earth Hour is a global event ...
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