Where will so many people live? How will we feed them?Unless we diffuse this "population bomb", by the end of the century we will need several Earths to survive. But we can't have several Earths, and so we will
When it first came into being 4.5 billion years ago, Earth was a dry rock. So where did all of our water come from? Scientists think that it might have arrived in the form of ice by an asteroid(小行星) from outer space that hit our planet. But this theory has not been confirmed ...
BBC人口危机纪录片《地球人口极限 How Many People Can Live on Planet Earth? 2009》自然学家David Attenborough带领我们探究地球是否正走向人口危机。 资源下载 此资源为普通纪录片,非解说素材【所有会员】均可下载,请先登录并升级VIP 升级VIP或有其他疑问请联系小助手微信号:fansworld135 ...
No craft, no crew can travel safely with such vast contradictions. On their resolution depends the survival of us all.doi:10.1016/j.envdev.2012.09.003NoneEnvironmental DevelopmentUNEP 2012 One planet, how many people? A review of Earth's carrying capacity a discussion paper for the year of ...
As climate change stokes larger and more intense wildfires, firestorms are likely to become more common. Here’s why they occur and what makes them so dangerous.
( )22. Planet Earth 1ll shows the ___ of the planet and how humans share the planet with nature. A. beauty B. fever C. risk D. mess 相关知识点: 试题来源: 解析 【答案】A【核心短语/词汇】planet:星球【翻译】《地球脉动3》展示了这个星球的美丽以及人类是如何与自然分享这个星球的。【解...
(每小题1分,共10分)How many people can the earth(地球) support?Today, over 8 billion people are living on our planet. But the world's population is still36. Every several years or so, we add another billion people to the earth.So, how many people can the earth support at 37?
④"Meals on Wheels” is a voluntary organization run by the Red Cross. It delivers meals to elderly people who are unable to cook for themselves. Every year volunteer drivers deliver a million meals. This enables elderly people to remain in their own houses. “车轮上的膳食”是红十字会管理的...
Here at National Geographic Kids, we know how much our readers want to make a positive difference to our world! So, read on to find out how to save the planet… 1. Be a habitat hero! All over the world,wild places are in trouble. As the humanpopulation has increased, we’ve taken...
The world's human population is growing too fast for the planet to sustain it. But just how many more people can exist on Earth until it reaches its breaking point? That's the central question of How Many People Can Live on Planet Earth?, a sobering BBC documentary production which is ...