在面向21世纪协调发展的大前提下，日本丰田汽车公司正在努力开发具有更高价值的21世纪的新型汽车。21世纪的汽车必须具有更高的社会使用价值，即汽车发展应与社会协调。为此，如何与环境相适应已成为技术开发的重要课题。环境问题包括两个方面：一是为了减少引起地球变暖的CO_ Under the premise of coordinated development in the 21st century, Toyota Motor Corporation of Japan is working hard to develop new 21st-century automobiles with higher value. Cars in the 21st century must have higher social use value, that is, car development should be coordinated with the society. For this reason, how to adapt to the environment has become an important issue in technology development. Environmental issues include two aspects: First, to reduce CO_ causing global warming