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Снижение рождаемости

Снижение рождаемости в развитых странах происходит из-за того, что люди достигли высокого уровня благосостояния и в их сознании происходит изменение системы ценностей. На смену ценностям, связанным с большой семьей, родственными отношениями, приходят идеалы комфорта, уютной, спокойной личной жизни, требующие больших затрат на их обеспечение. Таким образом, явно обозначился кризис сознания, ведущий к более высокому уровню потребления и препятствующий росту рождаемости населения,
В развивающихся странах, таких, как страны Африки, Индия, Индонезия, Малайзия и других, рост численности человеческой популяции до сих пор чрезвычайно активен. Там одновременно очень велики и рождаемость и детская смертность при сравнительно низкой продолжительности жизни. Возрастная пирамида развивающихся стран выглядит совершенно иначе, чем у развитых. Она имеет очень широкое основание, отражающее высокую рождаемость, и иллюстрирует высокую смертность в каждой десятилетней когорте. Средняя продолжительность жизни во многих развивающихся странах всего 40—50 лет, что примерно на 30 лет меньше, чем в экономически развитых странах.
Из-за социального и экономического кризиса 90-х годов состояние популяции человека в России в конце XX в. оказалось в критическом положении, ибо к этому времени смертность сильно выросла, а средняя продолжительность жизни
вместе с рождаемостью уменьшились. Странам, находящимся в кризисном состоянии (таким, как Россия), волна вымирания угрожает в первую очередь.
Для развитых стран лимитирующий фактор развития — загрязнение окружающей среды, связанное с высоким уровнем потребления. Чем выше уровень потребления, тем выше расходы энергии, природных ресурсов, и тем интенсивнее происходит ее загрязнение отходами производства, потребления и быта. Для развивающихся стран главный лимитирующий фактор — демографический. Высокая рождаемость сопровождается высокой смертностью и численность населения этих стран растет в геометрической прогрессии. В этих странах, как в любом аграрном обществе, при семейном хозяйствовании используются каждые рабочие руки, включая детские. При высокой смертности, для того чтобы в хозяйстве осталось 2—3 взрослых работника, семье нужно иметь хотя бы 8—9 детей. Во многих развивающихся странах дети составляют почти половину населения. Индустриальному обществу, наоборот, характерны небольшие семьи, ибо, как правило, выживают все дети, а их воспитание и образование стоит достаточно дорого. Для общества не менее важно и последующее содержание каждого его члена, что объясняется высоким уровнем потребления в таких странах. Так, в Индонезии, для обеспечения жизни одного человека расходуется примерно в 10 раз меньше природных ресурсов, чем в США. При этом основным фактором, лимитирующим продолжительность человеческой жизни, является голод, который зачастую бывает вызван истощением плодородия почв, например из-за вырубки лесов и кустарников, вызывающей их эрозию.
Таково начало порочного круга событий, ведущего к экологическому кризису.

Снижение рождаемости? Не страшно.

В животном мире большое потомство у видов где большая смертность. И у людей, хуже уровень жизни- рожают много детей-много умирает-хоть кто-то остаётся (так было всегда). Уровень жизни выше - сработал какой-то механизм, - всё, рожать не надо. свежие новости

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