LAKE KARIBA, Zambia (AP) — Tindor Sikunyongana is working hard to keep his welding business afloat. These days, that means relying on a diesel generator, but with the price of fuel climbing, it’s becoming harder for him to keep going. Like many in Zambia, Sikunyongana is caught in the grips of a worsening energy crisis caused by climate change. The entire southern region of Africa is suffering, and Zambia is facing an unprecedented shortage of electricity. “Only God knows when this will end,”