1.) _________is the availability of unobstructed, direct sunlight, which is particularly important in utilizing solar energy for space heating, water heating, electricity generation, and/or day lighting.

2.) The only challenge in using wind as an energy source is that wind is_________and it does not
always blow when electricity is needed.


Sagot :

Answer:

Passive solar design refers to the use of the sun’s energy for the heating and cooling of living spaces by exposure to the sun. When sunlight strikes a building, the building materials can reflect, transmit, or absorb the solar radiation. In addition, the heat produced by the sun causes air movement that can be predictable in designed spaces. These basic responses to solar heat lead to design elements, material choices and placements that can provide heating and cooling effects in a home.