Holly Thorpe's science fair project measured CO2 levels around school buses and led to the change.
from BBC News - World https://ift.tt/39BG95m
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The attack near Aden's airport is the deadliest to strike the temporary capital since last year. from BBC News - World https://ift.tt/...
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Police suspect the man also killed two more of his children from a previous marriage. from BBC News - World https://ift.tt/R1oEPsA
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By Neil MacFarquhar from NYT World https://ift.tt/lNGqcva
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