The graph here is produced from data made available at the Conversation article ‘Tis the season for conception by Micaela Martinez and Kevin M. Bakker (12/19/18). Is there a pattern that is similar for both New York and Texas? It sure seems like it. It turns out reproduction is seasonal across all living …
Read More »Clinker is responsible for how much of CO2 emissions?
In 2016 clinker contributed almost 2 billion tonnes of CO2, about 7% of the world total. What is clinker? The BBC article Climate change: The massive CO2 emitter you may not know about by Lucy Rodgers (12/17018) provides the answer. In short, clinker is the key ingredient in cement and the world …
Read More »Follow Up: How old is Arctic Ice?
In a follow up to our May 28, 2018 post, How old is Arctic Ice?, the Washington Post has an article, The Arctic Ocean has lost 95 percent of its oldest ice — a startling sign of what’s to come by Chris Mooney (12/11/18). It notes: In 1985, the new NOAA report …
Read More »Which country emits the most CO2?
The country that emits the most CO2 depends on how it is measured. Our World in Data has a graph of annual share of CO2 emissions by country. By this measurement, a graph with the top 5 countries (China, U.S., India, Russia, & Germany) in 2016 was downloaded from Our …
Read More »How fast is runoff from Greenland ice sheet increasing?
The Nature article Nonlinear rise in Greenland runoff in response to post-industrial Arctic warming by Luke Trusel et. el. (12/5/18) reports on Greenland ice sheet runoff. Referring to fig 4a (copied here) in their paper We show that an exceptional rise in runoff has occurred over the last two decades, equating to …
Read More »What are six trends in western U.S. wildfires?
NASA’s Earth Right Now blog post Six trends to know about fire season in the western U.S. by Kasha Patel (12/5/18) provides these trends. The first (see graph copied here from NASA RECOVER/Keith Weber), Over the past six decades, there has been a steady increase in the number of fires in …
Read More »More than half the U.S. population lives in what percent of counties?
The answer is the title of the Census Bureau post More Than Half of U.S. Population in 4.6 Percent of Counties by Haya el Nasser (10/24/18). The map copied here shows the counties. At the county level, the geographic distribution of the estimated 325.2 million people in the United States …
Read More »What are the demographics of 6- 21 year olds?
The Pew article Early Benchmarks Show ‘Post-Millennials’ on Track to Be Most Diverse, Best-Educated Generation Yet – A demographic portrait of today’s 6- to 21-year-olds by Richard Fry and Kim Parker (11/15/18) provides demographic information comparing early boomers, gen xers, millennials, and post millennials. For example, the graph copied here shows …
Read More »How effective is gerrymandering?
The article in Isthmus No contest – Dems sweep statewide offices in midterms but remain underrepresented in Assembly by Dylan Brogan (11/15/18) presents the graphic copied here. In short the dems won all races in terms of the popular vote but control only 36 of the 99 seats in the assembly. …
Read More »Happy Thanksgiving from Sustainabilitymath!
To all of you that have visited this site: Thank you! Please enjoy the holiday and look for a new post next week. Cheers, Tom.
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