An obstacle to sustainable development is the growth of ecotourism
increasing reliance on fossil fuels
negative population growth in developed countries
farm to table restaurants
decrease mass consumption

Two technicians are discussing oil changes. technician a says that waste oil and old filters need to be disposed of according to the law. technician b says that old filters can be returned to the parts department for a core value. which technician is correct?           a. technician a only   b. both technicians a and b   c. technician b only   d. neither technician a nor b