早在几十万年前,从人类懂得用火的第一天起,植物就是天然的燃料。后来,由于生产发展和科技进步,煤炭、石油等能源登上历史舞台,使得古老的绿色能源相形见绌,渐渐受到冷落。可是近几年来,绿色能源又开始受到科学家的重视。许多能源专家,不惜长途跋涉,钻进深山老林,潜入海洋,到处寻访这些绿色世界 Hundreds of thousands of years ago, plants were the natural fuel from the first day when human beings learned to use fire. Later, due to the development of production and science and technology, energy such as coal and oil boarded the stage of history, which dwarfed the ancient green energy and gradually cooled down. However, in recent years, green energy has begun to receive the attention of scientists. Many energy experts do not hesitate to travel long distances, get into deep forests, dive into the oceans, look for these green worlds everywhere