Name at least 3 disadvantages to using alternative sources such as wind, solar and nuclear energy? Please help it is past due by a lot

Iwill give extra points to who gets this right

Calcium chloride +gold(1) oxide—>

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.