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Answer key · for teachers
Figures as of November 14, 2026, from each chart's current data.
Chart 1 of 2 · Food and drug safety
The chart's answer: The FDA classified 77 food recalls for salmonella in 2025; the most since 2013 was 80 in 2016. Salmonella is a germ that causes food poisoning, often from eggs, produce, nuts, spices and pet food. A recall counts once however many products it covers, in the year FDA first listed it in its weekly Enforcement Report. Chartly sorted FDA's written reasons by their key words; a recall that names listeria too is counted on the listeria chart instead. Meat, poultry and most egg products are USDA's to recall and aren't included. The newest salmonella recalls, this year's included, are listed below.
In one sentence of your own, what does this chart show?
Open question: answers will vary. Look for answers that use the chart's numbers and source.
Find the biggest change or difference in the chart. What might explain it?
Who collected these numbers, and how recent are they? What else would you want to know before drawing a conclusion?
Source: U.S. Food and Drug Administration, Enforcement Reports (openFDA food recall data) (Public domain (U.S. government work); source U.S. Food and Drug Administration, openFDA) · Data as of Nov 4, 2026 · chart.ly/charts/salmonella-food-recalls-per-year
Chart 2 of 2 · World
The chart's answer: In 2024, people in the United States emitted 13.6 tonnes of carbon dioxide each, in China 9.3 and in India 2.2, against 4.7 worldwide. The highest figure was 82.8 tonnes in Palau, then Qatar (47.3) and Bahrain (23.9). Search 203 countries and territories. The figures count carbon dioxide from burning fuel, industry and other sources, but not from changes in land use such as cutting forests; in a small country, a few power plants, refineries or fuel sales spread over few people can make the figure very high.
Compare the United States, China and India. Which emits the most per person, and is that the one that emits the most in total?
Why might some small countries have the highest figures on the chart?
Which seems fairer for comparing countries' share of the blame for climate change, total emissions or emissions per person? Why?
Open question: answers will vary. Look for answers that use the chart's numbers and source.
Source: World Bank, World Development Indicators: Carbon dioxide (CO2) emissions excluding LULUCF per capita (t CO2e/capita) (CC BY 4.0 (credit the World Bank)) · Data as of Dec 31, 2024 · chart.ly/charts/carbon-emissions-per-person-by-country
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