Soil is essential for life on Earth. It is needed for food, air, clothing and so much more. Discussion topics include the terms 'soil', 'dirt', and 'sediment', factors affecting the formation of soils, soil horizons,...
Obesity is on the rise in the United States, due primarily to the size and composition of the American diet. Discussion topics include lack of exercise, changes in calorie intake over time, and environmental impacts of...
Due to the presence of dissolved gases such as carbon dioxide, rainfall is naturally acidic. The release of other gases and chemicals such as sulfur dioxide during the combustion of coal and oil can cause rainfall to...
This exercise, from the Environmental Science Activities for the 21st Century Project, is designed to introduce students to the idea that human activities can alter the chemistry or gaseous composition of the atmosphere...
We've argued that societal stratification is "both a condition and a process" (Kerckhoff, 2000). The former captures what the distribution of valued resources (e.g., money, education) among other things look like in a...
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