Category Nuances for renewable_energy:

• economic,
• clean,
• smaller,
• developing,
• dynamic,
• main,
• successful,
• environmental,
• sustainable,
• innovative,
• desirable,
• strategic,
• technological,
• new,
• diverse,
• alternative,
• intensive,
• varied,
• noble,
• important,
• relevant,
• industrial,
• hot,

Simple Categories for renewable_energy:

• activity,
• sector,
• initiative,
• sustainability,
• energy,
• system,
• action,
• measure,
• development,