average carbon dioxide emissions per person in four countries — the United Kingdom, Sweden, Italy, and Portugal — from 1967 to 2007.

The graph illustrates the average carbon dioxide emissions per person in four countries — the United Kingdom, Sweden, Italy, and Portugal — from 1967 to 2007. Overall, carbon emissions per capita decreased in the UK and Sweden during this period, while they increased steadily in Italy and Portugal. In 1967, Portugal had the lowest emissions […]