View full lesson: https://ed.ted.com/lessons/population-pyramids-powerful-predictors-of-the-future-kim-preshoff
Population statistics are like crystal balls — when examined closely, they can help predict a country’s future (and give important clues about the past). Kim Preshoff explains how using a visual tool called a population pyramid helps policymakers and social scientists make sense of the statistics, using three different countries’ pyramids as examples.
Lesson by Kim Preshoff, animation by TED-Ed.
Tianjin Reliance Steel Pipe Industry & Trade Co., Ltd. was officially founded in 2004, and is located in Caigongzhuang Industrial Area in Jinghai County, Tianjin, China. We are a joint-stock enterprise, with 3 branch plants.
Our main products are:
Welded Pipes, Square & Rectangular Hollow Section Tubes
Galvanized Steel Welded Pipe and Pre-galvanized Steel Pipes.
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