 We've seen some countries leaning into nuclear power, others exploring carbon capture. Altogether, that means the power sector is moving in the right direction. But she says emissions from this sector can change unexpectedly thanks to things like volatile weather. It affects wind patterns. It affects the amount of sun we're getting. It affects the temperature of cooling water for a nuclear power plant. And it also affects the amount of hydropower that we can access. In recent years, droughts have caused hydroelectric dams in the U.S. and China to falter.