What did mary and louis leakey discover that affected our understanding of early hominids?

Mary and Louis Leakey discovered and researched the fact that human beings’ first cradle or home was Africa and not Asia as previously thought. Later there were more discoveries made about remains of early hominids which supported their theory and helped scientists improve their understanding.

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.