The national conservation committee

provided two million jobs planting trees, building dams and irrigation systems, and established soil conservation and wildlife protection programs

conducted the first scientific study of the country's water, forest, soil, and mineral resources

set aside 150 million acres of public land as national forest reserves

set federal air pollution guidelines and extended federal enforcement power

a.

congress passed laws allowing for free passage between states.

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.

i dont know the answer sorry but if i knew it i would of told you