"in order to reduce the amount of air pollution in pennsylvania, which change is necessary?
(1)laws must be passed to protect endangered species.
(2)the use of natural resources must be increased.
(3)more coal-burning power plants must be built.
(4)the cooperation between the different states must be improved."

Jane is blood type a her husband is blood type b. jane is puzzled because their daughter is type o. explain how the daughter inherited a blood type that neither of her parents had explain your answer

Why do oceanic plates tend to subduction when colliding with a continental plate

What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas