1477
Molecular artificial photosynthesis is an emerging technology based on principles learned from Nature where individual components perform the essential light - harvesting , charge - separation , and water splitting functions to store solar energy in the form of chemical bonds .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None