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NoticeI am no longer posting new puzzles to this blog. For all of my Sudoku puzzles, old and new, please visit Sudoku in another section of this website. I will still create and offer new puzzles, in batches of a couple of hundred, once a week or so. Sudoku #25Category: Sudoku The heat wave rages on in southern Ontario. Yesterday, I took my daughter to Morningside Mall (or rather, what's left of it). The air was stifling. But it wasn't the heat. Nor was the humidity a problem. What made breathing difficult was the smog. I had never breathed such disgustingly dirty air. Now more than ever we need to find alternative energy sources. Coal may still be plentiful and cheap, but the burning of coal is still one of the biggest sources of air pollution. If we keep the coal plants open, the problem will only get worse over time, and that will continue to kill people. As with solving Sudoku puzzles, the problems with energy and pollution must be looked at logically. Hoping and praying for a solution can never work. We need to apply intelligent thought to these serious problems facing us. Hans
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