alternative energy, substitute energy

use, usage

increase

(Classical Japanese) to be watching continuously, to be on watch repeatedly, to be on look out

(Classical Japanese) to be watching continuously, to be on watch repeatedly, to be on look out / (Classical Japanese) to protect something, to take care of something

(Classical Japanese) to be watching continuously, to be on watch repeatedly, to be on look out / (Classical Japanese) to protect something, to take care of something

(archaic) to stand watch over something, to be on the lookout for something (such as a watchman controlling entry to a place) / (archaic) to protect or defend something, to ensure that something is safe

護る: to protect, to defend / to watch carefully / to abide (by rules), to observe (regulations)

substitution

to substitute