A study of the world’s megacities, those with a population greater than 10 million people, highlights the difficulties in resource use facing developing and developed cities around the world. As of 2010, there were 27 megacities around the world, and it is likely there will be 10 more by 2020. Developed cities, such as New […]
Tag: population
Night-time squawking helps track bird migration
New audio recordings confirm that Lake Erie is not a barrier to bird migration, but that birds pick their routes so as to stay above islands if possible. Migratory birds fly at night, so the team used audio recordings from the north shore of Lake Erie and from Pelee Island — in the middle of […]
