In many of the countries where some of the world's largest climate cases are unfolding, the legal system looks very different than it does in the former English colonies. In much of Europe and Latin America, for example, the Roman system dominates and it works very differently, with judges gathering their own evidence in cases. Another key difference? Reliance on precedent in common law countries like the U.S. ... a topic that's becoming more important to understand every week.

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