(Refiles with new link to photo essay in bullet points.) By Charlotte Greenfield and Gloria Dickie JACOBABAD, Pakistan (Reuters) -Heavily pregnant Sonari toils under the burning sun in fields dotted with bright yellow melons in Jacobabad, which last month became the hottest city on Earth. Her 17-year-old neighbour Waderi, who gave birth a few weeks ago, is back working in temperatures that can exceed 50 Celsius (122 Fahrenheit), with her newborn lying on a blanket in the shade nearby so she can feed him when he cries. “When the heat is coming and we’re pregnant, we feel stressed,” said Sonari,…

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