China is one of the world’s largest countries, both by land mass and population. It has a rich and fascinating history and has made great contributions to society. Did you know that Emperor Qin Shi Huang ordered the construction of the Great Wall in the third century BCE as a way to prevent invasions from barbarian nomads into the Chinese Empire? Or, that an imperial census counted approximately 60 million people in the country in the year 1 CE? Take our China population quiz to learn more!
The U.S. national fertility rate was 1.9 children per woman in 2016, a figure which is lower than the replacement level of 2.1 children per woman. Considering the U.S. fertility rate was 3.7 in the 1960s, it might seem that our population would decrease. Yet this is not the case.
10th Grade Entrepreneur is Saving Coral Reefs One T-Shirt at a Time
What is a census?
Game theory is the study of human cooperation and conflict in competitive situations. A lot of people may be intimidated by the topic of game theory, because it sounds complex. But game theory can be understood in very simple terms, and it can be a powerful teaching tool for students working to understand world history, modern political interactions, and environmental science. Simply put, game theory assumes that the players act rationally—that they will try to make the best decision to obtain their own best possible outcome—and then examines how different situations play out.
Yesterday’s announcement by President Trump that he intends to pull America out of the Paris Agreement on Climate Change is devastating on a number of levels. It is a repudiation of settled science, a failure of leadership on clean energy innovation, and an abdication of moral leadership on an issue that will determine the fates of millions of people and all of our ecosystems in the years ahead. In short, a catastrophic move with dire consequences.
Today’s middle and high schools students will grapple with the effects of a changing climate for the rest of their lives. Even if all greenhouse gas emissions stopped today, the momentum of built-up CO2 in the atmosphere means temperatures would continue to increase, sea level would continue to rise, and weather patterns would continue to shift.
There are currently 228,000 identified species calling the oceans home, but surely many more exist. Some that have yet to be named, and others that have yet to be discovered. But the world’s oceans are more than just a habitat and humans rely on them for transportation, resources, and various ecosystem services.
Over 50% of the global population, more than 3.7 billion people, live in urban areas. Back in 1800, only 3% of people were occupying cities. This large migration of people from rural to urban spaces in a relatively short amount of time had dramatic impacts on both urban dwellers and the surrounding environment.