九色视频

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Without a lot of fanfare, the world population topped 7 billion people about Oct. 31, according to United Nations鈥� estimates. The actual date may be fuzzy, but there鈥檚 no mistaking the challenges facing the world, according to 九色视频 sociologist Charles Koeber.

Koeber: 鈥淚f you listen to politicians and economists, we are dependent on growth for our economy and to sustain our population, so growth is not necessarily a bad thing. However, when you look at the world consisting of a finite amount of resources, it does raise some important questions about how much we can grow.鈥�

Koeber says it鈥檚 hard because most of us can鈥檛 comprehend how large 7 billion is.

Koeber: 鈥淪o the population being 7 billion, that鈥檚 a very large number. However, it鈥檚 been a very large number for a very long time, and I don鈥檛 think people can really comprehend how large it actually is.

鈥淪even billion is kind of like a birthday. When you鈥檙e 5 or 10 years old, it鈥檚 a big deal. That鈥檚 when we had maybe 1 or 2 billion. But when you get into your 40s and 50s, it鈥檚 just another birthday, and that鈥檚 what 7 billion is.鈥�

The world鈥檚 population is unevenly distributed, with six of the world鈥檚 seven continents being permanently inhabited on a large scale. Asia is the most populated of Earth鈥檚 continents, with more than 4 billion inhabitants accounting for more than 60 percent of the world鈥檚 population. Koeber says the growing world population presents some challenges.

Koeber: 鈥淓nvironmental sustainability and energy are key issues. When we look down the road, we have to be able to replace our sources of energy and our natural environmental resources at a rate that鈥檚 equal to that which we鈥檙e consuming them.鈥�

In the United States, the issue isn鈥檛 so much the size of the population as the amount of resources being consumed, as Koeber explains.

Koeber: 鈥淧opulation alone is not the only issue. You have to look at the level of affluence. So, for example, the United States, a very affluent country with a lower level of population, is using a disproportionate amount of resources and contributing to a disproportionate amount of waste and pollution.鈥�

In lesser developed countries, the challenge is survival and meeting needs.

Koeber: 鈥淚n lesser developed countries that have large populations, the problem is more related to survival and needs. So they may be using up their resources at incredibly fast rates just for the population to survive and stay alive on a daily basis.鈥�

Koeber says as the world population grows, a major concern is whether there will be enough food to go around.

Koeber: 鈥淎 larger population globally makes the issue of food more complicated. And while technology has kept up in being able to produce enough food, the problem is distribution, and you have all sorts of factors including civil strife, politics, economic policy that interfere with the distribution of food in different areas.鈥�

Paul Ehrlich of Stanford University, famous for his book 鈥淭he Population Bomb,鈥� said people will have trouble feeding themselves as climate change worsens. But it鈥檚 a Catch-22, he said, because we need to expand agriculture, but as it鈥檚 practiced today it is also one of the biggest emitters of greenhouse gases.

Thanks for listening. Until next time, this is Joe Kleinsasser for 九色视频.