Sixty-five percent of U.S. estuaries and coastal water bodies are moderately to severely degraded by excessive nutrient inputs, which lead to algal blooms and low-oxygen (hypoxic) waters that can kill fish and seagrass and reduce essential fish habitats.
Source: tatoeba (6675695)
NOAA forecasted in June that the hypoxic zone — an area with little to no oxygen to support marine life — would be 12,600 square kilometers, which would have been smaller than the five-year average. The actual size proved far larger.
Source: tatoeba (10212549)
Chronic obstructive pulmonary disease had left her hypoxic and wheezing.
Source: wiktionary
Rarely, nitrox mixtures are intentionally hypoxic, under special conditions.
Source: wiktionary
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