If that was all about harmony of man and environment. . . . .
first, they introduce what nature have and what within the nature that we must not waste, next, as time goes by humans used to develop technology, infrastructure, and economy,the environment was slowly killed by people, then, icebergs start to melt, global warming was spread through the earth, resources was slowly gone, finally, at the end of the video we, humans must think not only for the needs of ourselves, but also for our environment,cause at the end, we're the who'll suffer..

that's all . . THANK YOU. .but you must have your own answer cause i think that was your assignment, that was given on us. . .  maybe few weeks ago. . :)