Argentina fans of Liam Payne gather at Buenos Aires obelisk
Fans pay tribute to British singer Liam Payne at the Buenos Aires Obelisk, after the former One Direction member fell to his death from a hotel balcony in the capital. IMAGES
Videografik: How Air Conditioning Works
Source: AFP (Glomex)
Air conditioners cool rooms using a circulating refrigerant. However, these devices require electricity and often operate with refrigerants that themselves contribute to global warming.
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