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  2. Effects of high altitude on humans - Wikipedia

    en.wikipedia.org/wiki/Effects_of_high_altitude...

    Physiological functions at high altitude are not normal and evidence also shows impairment of neuropsychological function, which has been implicated in mountaineering and aviation accidents. [1] Methods of mitigating the effects of the high altitude environment include oxygen enrichment of breathing air and/or an increase of pressure in an ...

  3. Economy of the United States - Wikipedia

    en.wikipedia.org/wiki/Economy_of_the_United_States

    Real GDP grew at a quarterly annualized rate of 2.2% in Q1 2018, 4.2% in Q2 2018, 3.4% in Q3 2018, and 2.2% in Q4 2018; the Q2 rate was the best growth rate since Q3 2014, and the overall yearly GDP growth of 2.9% in 2018 was the best performance of the economy in a decade. [139]