Asmo and Charlotte look like your run-of-the-mill, quarter-ton pink pigs who spend their days snorting and eagerly awaiting their next meal. But they're doing their part to help the environment by taking part in a campaign by students at West Hempfield Middle School to generate as little trash as possible. The pigs from Logan Family Farms in Hempfield are fed food scraps left over from the lunches of the middle-schoolers, who adopted them in November. Principal Aaron Steinly recently started taking a recycling container of salad, orange peels, half-eaten apples and other fruits and vegetables to the farm. He estimates the school nets about 125 pounds of food scraps weekly for the pigs, whose daily diet typically consists of about 4 pounds of grain.