Forage fish like these at a Chilean processing plant are often used for fish meal used in aquaculture. But critics consider this inefficient and wasteful and worry it could deplete fish populations. Now several companies are developing protein substitutes to replace fish meal.
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Dishwashers have come a long way since this 1921 model, which was designed mainly to help minimize the drudgery of housework. But today's sleek models are also designed with water conservation in mind.
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The Keystone Sanitary Landfill outside Scranton, Pa., is pushing to expand its permit for another 50 years. Local activists concerned about the environmental impact are pushing back.
Jessica Kourkounis/Keystone Crossroads