because they have many population and many other countries visited the singapore because of the environment, beautiful place and etc..
In terms of land area : Brazil
Nitrogen (78%), Oxygen (21%), Argon (0.9%), and the remaining 0.1% consists of traces of neon, krypton xenon, carbon dioxide, nitrogen oxides, and traces of others. so Nitrogen is the greatest. I hope this helps :)
It tells you that there used to be an ocean in the area the rock was found.
The renewable energy source is Hydroelectricity.
