In the past 30 years, the conservation of natural environment comes to the fore as a global problematique for the distribution of energy and for the vital of human race.

• 二十世纪末，人类已从过去三十年间的环境生态与能源危机等严重的全球性问题，体认到环境保护的重要性与迫切性，科学技术领域已陆续表现出对此议题的关切想法与态度。