October 2018 1 16 Report
Cadangan sumber daya alam bahan tambang Indonesia sangat melimpah.Meskipun demikian,saat mengeksplotasinya harus bersikap bijak karena
a.bersifat mudah rusak
b.bernilai ekonomis tinggi
c.memiliki banyak kegunaan
d.jumlahnya di alam terbatas

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