(KC Nwakalor | The New York Times) Faith Osi holds her sleeping infant daughter, Miracle, on her family's cassava farm in Obrikom, in the heart of Nigeria's oil-rich delta, July 20, 2020. Around the world, the poor and marginalized are much more likely to be vulnerable to extreme heat; methane gas flares burning around the clock in Obrikom make this already hot area worse still.