It can be a challenge to distinguish allergic symptoms from dry eye symptoms. Treating a patient who presents with concurrent allergy and dry eye symptoms, however, can be an even greater challenge.
User: how did chinas physical geography affect the development of its early civilizationWeegy: Chinas physical geography affected the development of its early civilization, because they were not close to any other countires, so they did not know to trade with other countries or did not know any other cultures.
China is currently undergoing the most rapid case of overpopulation and urbanization any country has ever seen, leading to a multitude of environmental problems. Although China's population growth has slowed considerably, its ecological footprint is increasing faster than ever before due to the country's rising affluence level. Some of these environmental effects are well known -- particularly urban air pollution and carbon emissions, while other go largely under the radar such as declining supplies of food and fresh water.