"New" TV by AlexanderD

Question 3

This "new" cartoon series saw season 3 change animation studios (from being outsourced to DIC to being brought in-house to Hanna-Barbera), as well as the voice of Gaia, the spirit of the earth, from Whoopi Goldberg to Margot Kidder. Debuting in 1991, what "hero for Earth" was "new" starting in 1993?

Captain Planet