No, putting Solar Panels in Oregon and Washington state is contrary to belief, bad for the environment. Just like Capital and Resources you can mis-allocate Solar Panels. Put them at wrong place and the economic and environmental returns will be negative.
In the following map, the areas that are deep-red and red is where Solar is both economical and environmental positive. Orange, may be environmental positive area. The rest of it is, mis-allocation. Simply putting Solar Panels on top of Walmart in St.Louis or Chicago or Seattle does not cut. But if the Walmart is in Bakerfield, Scottsdale and Santa Fe - it will be the right thing.