According to the UN, it is predicted that the human population could reach ten billion people by the year 2050. For broadcaster and naturalist Chris Packham, who has dedicated his life to championing the natural world, the subject of our growing population and the impact it is having on our planet is one of the most vital – and often overlooked – topics of discussion in an era of increasing environmental awareness. 　　Chris is worried that a world of ten billion may simply be too many people for the earth to sustain, given the impact 7.7 billion humans are already having. Travelling around the globe in search of answers to difficult and sometimes controversial questions, Chris investigates why our population is growing so rapidly, what impact it is having on the natural world, and whether there is anything that can be done. 　　Chris travels to Brazil to discover a megacity on the verge of running out of water and an industry expanding to feed our growing numbers – with dire consequences for biodiversity. In Nigeria, a country set to become the third most populous nation on earth by 2050, overtaking the United States, Chris visits an extraordinary community surviving against the odds and a school that might hold the answer to a future fall in the birth rate. Back home in Britain, Chris interviews Sir David Attenborough – like Chris, he is a patron of the charity Population Matters. Chris also examines the role of falling birth rates around the world, the impact of an aging population, and meets a couple who are struggling to get pregnant through IVF. 　　With interviews from several population experts, Chris’s focus ultimately turns to the impact our levels of consumption are already having, and asks whether the world can rebalance to accommodate the needs of over two billion more people.

According to the UN, it is predicted that the human population could reach ten billion people by the year 2050. For broadcaster and naturalist Chris Packham, who has dedicated his life to championing the natural world, the subject of our growing population and the impact it is having on our planet is one of the most vital – and often overlooked – topics of discussion in an era of increasing environmental awareness. 　　Chris is worried that a world of ten billion may simply be too many people for the earth to sustain, given the impact 7.7 billion humans are already having. Travelling around the globe in search of answers to difficult and sometimes controversial questions, Chris investigates why our population is growing so rapidly, what impact it is having on the natural world, and whether there is anything that can be done. 　　Chris travels to Brazil to discover a megacity on the verge of running out of water and an industry expanding to feed our growing numbers – with dire consequences for biodiversity. In Nigeria, a country set to become the third most populous nation on earth by 2050, overtaking the United States, Chris visits an extraordinary community surviving against the odds and a school that might hold the answer to a future fall in the birth rate. Back home in Britain, Chris interviews Sir David Attenborough – like Chris, he is a patron of the charity Population Matters. Chris also examines the role of falling birth rates around the world, the impact of an aging population, and meets a couple who are struggling to get pregnant through IVF. 　　With interviews from several population experts, Chris’s focus ultimately turns to the impact our levels of consumption are already having, and asks whether the world can rebalance to accommodate the needs of over two billion more people.

本部纪录片是BBC地平线系列推出的一档探寻“土星的秘密”为命题的纪录片。土星，这颗人类用肉眼能够看到的最远行星，以其神秘美丽的土星环而被赋予诸多神话色彩。为了能够近距离地研究土星，美国国家航空航天局于1997年10月15日发射了“卡西尼-惠根斯”探测器。这将是关于航天史上最为野心勃勃的一次无人驾驶航天飞船项目，土星之谜即将被揭开。 　　土星拥有为数众多的卫星，而最著名的“土卫六”上有大气一说，更是最受天文学家瞩目的课题，也是本部纪录片的高潮所在。千百年来，人类都在试图揭开生命起源之谜。那么我们就跟随地平线摄制组的脚步，一起踏上这个跨越太阳系的伟大征程。通过探测这个未知的外星世界，来解答生命是如何开始的提问。

本部纪录片是BBC地平线系列推出的一档探寻“土星的秘密”为命题的纪录片。土星，这颗人类用肉眼能够看到的最远行星，以其神秘美丽的土星环而被赋予诸多神话色彩。为了能够近距离地研究土星，美国国家航空航天局于1997年10月15日发射了“卡西尼-惠根斯”探测器。这将是关于航天史上最为野心勃勃的一次无人驾驶航天飞船项目，土星之谜即将被揭开。 　　土星拥有为数众多的卫星，而最著名的“土卫六”上有大气一说，更是最受天文学家瞩目的课题，也是本部纪录片的高潮所在。千百年来，人类都在试图揭开生命起源之谜。那么我们就跟随地平线摄制组的脚步，一起踏上这个跨越太阳系的伟大征程。通过探测这个未知的外星世界，来解答生命是如何开始的提问。

黑白片

Corby镇出现多名天生四肢畸形缺陷的新生儿，调查发现可能与当地污染废料有关。

Corby镇出现多名天生四肢畸形缺陷的新生儿，调查发现可能与当地污染废料有关。

本集地平线节目中，自然学家David Attenborough带领我们探究地球是否正走向人口危机。