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Leif Brottem

Leif Brottem, assistant professor of global development studies at Grinnell College, spent two years working on tree planting projects in West Africa.

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A Fulani herding boy walks with his cows in a field outside Kaduna, northwest Nigeria. (Getty/Stefan Heunis)

Blame climate change for Nigerian farmer-herder violence? Not so fast, expert says

Leif Brottem