phrasal verb of( build-up) which of the following is the definition of build up (to improve something )or( to add increase something over period)?

Advantages

1) Reduces Electricity Bill

2) Low Maintenance Costs

3) Technology Development

4) Hydroelectric power stations

5) Diverse Applications

Disadvantages

1) Solar Energy Storage is Expensive

2) Associated with Pollution

3) Weather Dependent

4) DC power

5)Solar panels

Explanation:

Solar power is a 100% clean, renewable energy source. It reduces reliance on oil, coal and natural gas for electricity production. These fossil fuels produce harmful emissions that affect the quality of air, water and soil, and are responsible for global warming. However sources such as wind turbines and solar cells rely heavily on the weather. If it is not a windy day, wind turbines will not turn. And if it is not sunny, solar cells will not produce much electricity.