How did the Supremacy Clause solve the issue of a weak central government?

The Supremacy Clause is a formulation in the Constitution that stipulates that the Constitution and laws of the United States, as well as international treaties concluded by the United States, are the supreme law of the country. The clause also obliges state judges to abide by the US Constitution, laws, and international treaties, even if individual state constitutions and laws conflict with federal law. State constitutions also recognize the supremacy of the US federal Constitution. In this way, this clause guaranteed the preeminence of the federal government over state governments, by guaranteeing that their legislation is a priority before local legislation.

this statement is true.

forests are public goods, available for everybody. when usage of such a good becomes interesting for consumers and its usage increases, there can be a risk of overexploitation. it is a non rival good therefore, if one person consumes the good it does not reduce the availability for subsequent consumers.

these caracteristics require the establishment of measures in order to prevent the destruction of a commonly owned space, for example, to restrict the amount of people that have access to the same time.