What do you mean? The Earth does not "grow" and is not really bigger now than at any point in the past (since the creation of the Moon). On the contrary, it is losing mass through the escape of light atoms escaping, but even that is absolutely tiny.
Also, the Earth is absolutely not a living organism.
The earth is both gaining mass and losing mass at the same time
We are losing gases and energy (hydrogen, helium, radioactive decay)
Concurrently, we are aggregating cosmic dust, micrometeorites, meteoroids, and the occasional larger body
Overall a tiny loss
What he means is probably the idea of Earth Expansion. See Ott Christoph Hilgenberg, a disciple of Alfred Wegener, and more recently (but still a couple decades ago) Australian geologist Samuel Warren Carey. Here's a 1982 video featuring him on the topic of “Planet Earth: A Question of Expansion”:
https://youtu.be/Othb0xsvZb4 – 26 minutes
This view is kinda ostracized in geology and considered heresy.