Noun
きほう
一番最初にしなくちゃいけないことが、陶芸用の粘土から気泡を取り除くことです。
The first thing we have to do is remove the air bubbles from the pottery clay.
Energy bubbles are bubbles filled with the "energy" that's all around us (air). That's why this is an air bubble.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.