economic goods?

可以用中文答嘛??
因為有d地方會有旱災既..
咁o個d地方咪好需要雨水囉..
同埋有d地方就成日有水災既..
咁咪需要sunshine囉..
又好似air..係free goods嘛..
如果你去到太空..
太空冇氧氣..咁係咪要買氧氣呀??
咁o個陣時..air咪唔係free goods..
而係economic goods囉..
簡單d o黎講..即係當free goods o係某d情況之下..
你要比錢去買既..咁咪係economic goods囉..
希望解答倒你既問題吧

although
we need not to pay for these natural resources
they are not free goods
a good free of charge may not be a free good

- depends on the use of them
- they are not sufficient to satisfy all our wants
- more of it is preferred