-20 years, 300 words, Earth-
My 20 years of world travel, everything. will probably be comfortable, you don't need to own a car because it have railcar journey to the provinces with a high speed train. Absolutely comfortable people don't using a car but use a bike for the best environment in the world. Everyone has their own life have a time at wrist. Use instead of things to life on Earth. There is no cheat, there is no selfishness, but the sacrifice has to share.
If you help a fellow human you will have more time of life. but if you selfish younever helps another human you will don't have of life.