How does the Haber process affect humans?

Answer 1

The Haber process is used for making ammonia from nitrogen and hydrogen. It affects humans by providing an industrial method of producing large quantities of ammonia. Because of the fertilizer produced from the ammonia, we were able to avoid the "Malthusian Catastophe", which predicted that human population growth would outpace agricultural growth. Today, one-third of the world's population is sustained by the Haber process.

If for some reason you meant "What would happen to a human if he were subjected to the Haber process," he'd die. The human body isn't designed to tolerate temperatures of over 300oC or even anywhere near it. Pressures of over 150 times normal atmospheric pressure aren't good either.