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The obesity epidemic has a simple solution. If you want to lose weight, either eat less, or breathe more.
Electric cars powered by hydrogen fuel cells don’t produce greenhouse-enhancing carbon dioxide. But producing hydrogen does-and if we want to reduce our petroleum dependence, we’re going to have to reconcile ourselves to that fact.
Are they honorable or horrible? We don’t yet know-but they might give us valuable options in Iraq and elsewhere.
Want to lose weight? Easy! Just remember the first law of thermodynamics: conservation of energy. Oh, and you’ll have to not mind being hungry.
There will be 10 billion people on Earth by 2100–and all of them can live comfortably if advances in energy-saving technology continue.
There is a lot more we don’t know now about mass extinctions
Politics aside, the Iraq war had its ups and downs. Those who fought it are busily analyzing the successes and failures.
The biggest danger from radiological weapons is the misplaced panic that they would cause.
Treaties that mandate emissions reductions aren’t the ultimate solution. R&D on efficiency technologies is.
More research on nuclear waste storage won’t reassure the public