Just about everyone in the Northwest should be concerned about the potentially devastating effects of climate change. And just about everyone should realize that there is only one way to head off the environmental disaster looming ahead -- an aggressive combination of improvements in energy efficiency and a major increase in the use of energy sources that do not release global-warming gases. With no possibility of increases in our large-scale hydropower projects and now talk of removing some existing dams, that means an increasing use of the only other large-scale, emissions-free source: Nuclear power.