In the eia post, More than 60% of energy used for electricity is lost in conversion, by Bill Sanchez (7/21/2020), includes the flow diagram here. Note the flow across the top represents conversion losses. Electricity is a secondary energy source that is produced when primary energy sources (for example, natural gas, coal, …
Read More »What’s new at sustainabilitymath?
There is now a new page that contains animations for concepts related to statistics and calculus. They are not sustainability related, but since I post materials for calculus and statistics and I have been playing with R, I decided to post these. There are 19 topics covered with 36 animations. …
Read More »How hot was June 2020?
From NOAA’s Global Climate Report – June 2020: Averaged as a whole, the global land and ocean surface temperature for June 2020 was 0.92°C (1.66°F) above the 20th century average of 15.5°C (59.9°F), tying with 2015 as the third highest June temperature departure from average in the 141-year record. Nine of the …
Read More »How do we calculate sea level?
If you aren’t sure how sea level is calculated then read NASA’s Sea Level 101: What determines the Level of the Sea? by Alan Buis (6/3/2020) . Here is one factor: If our ocean had no tides or currents, the sea surface would assume the shape of the geoid. These …
Read More »How do I teach about climate change when I know so little?
If you would like to incorporate climate change in your math class, by say using the calculus or statistics project here, but you don’t feel like you know enough, then you need an overview for teachers. The Paleontological Research Institute has a teacher-friendly guide to climate change. The audience for …
Read More »Is there a relationship between education level and marriage?
The U.S. Bureau of Labor Statistics post 60 percent of college graduates born from 1980 to 1984 were married at age 33 (6/30/2020) provides the chart copied here. At age 33, people with higher levels of education were more likely to be married and less likely to be cohabiting than …
Read More »Is the racial wealth gap evenly distributed by class?
The article The Racial Wealth Gap is About the Upper Classes by Matt Bruenig (6/29/2020) on the People’s Policy Project explains. First the racial wealth gap is large: If you take the net worth of all white households and divide it by the number of white households, you get $900,600. …
Read More »What’s New at sustainabilitymath?
The data sets for the calculus and statistics projects have all been updated. Along with the traditional Excel file each tile now has a csv file with the data used to create the graphs. The associated R file now pulls the data directly from the csv file. Of course you …
Read More »What is the relationship between class, race, and police killings?
The People’s Policy Project reports on their recent research paper in the post Class and Racial Inequalities in Police Killings (6/23/2020). The full paper, Police Killings in the U.S. is by Justin Feldman, ScD. In general, The highest-poverty areas have a police killing rate of 6.4 per million while the …
Read More »What are Warming Stripes?
The image here from ShowYourStripes has a vertical strip representing global average temperature anomalies from 1850 to 2019 where darker blue is cooler and darker red is warmer. This graphic style, warming stripes, is credited to Ed Hawkins. The ShowYourStripes page has similar graphics for different regions. On the Climate …
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