Read the text. Some parts of the text are left out. Fill in the gaps with the missing phrases.

Read the text. Some parts of the text are left out. Fill in the gaps with the missing phrases.
A. Nowadays humanity is solving the problem of natural resources and environmentally friendly power manufacturing. In order ... to these issues, solar energy plants are becoming widely used. However, ... as traditional energy plants, ... . If traditional energy plants didn’t damage the environment badly, scientists wouldn’t need ... .
B. Scientists are trying to find ways ... by using various materials ... . One of the newest materials to use is perovskite. Scientists got interested in this material due ... , which ensures maximum energy output to the outside.
C. One of the technologies suggested by engineers is sun tracking. They noticed ... in the direction of the sun, because it heats the surface of the plants more ... . The phenomenon of plants tracking the sun's motion ... is called heliotropism. This biological habit is simulated in the construction of solar panel holders. ... of perovskite with such construction, it will reduce the cost and increase the efficiency of solar panels.