We should save electricity for energy conservation.

We should increase the use of alternative energy to protect the earth.

The potential energy of this ball is large because it is in a high position.

The potential energy of this ball is proportional to its height.

Ionization energy is the minimum energy required for an atom or molecule to lose an electron.

We had a picnic in the forest park over the weekend.

We are planning to go to the national park this weekend.

The parkway is one of the best places to enjoy the beauty of nature.

We are planning to go to the national park this weekend.

On this stage, pin spots are being used effectively.