Cambodia has an estimated 25 different mineral types, from bauxite to zinc, gold, iron, and gems.
Thailand is the world's largest rice exporter, followed by Vietnam, and Cambodia meanwhile exports about 100,000 tons per year.
Agriculture has emerged as a main economic driver for Cambodia, propping up the country in the wake of the 2008 financial crisis.
A total of four people have died in storms and flooding since Sunday.
Heavy rains on Monday flooded the homes of at least 1,000 people in the Boeung Kak lake area of Phnom Penh.
Local authorities are still assessing the damage from Sunday's storm, which may have destroyed some homes.
Lack of information about proposed Sambor hydro dam across the Mekong in Kratie raises concerns for locals.
The high cost of the systems mean they are generally installed for the well-off, in places like new villas.
The government has been tearing down these kinds of reservoirs since late June, under the new Tonle Sap Authority.
The meeting was to discuss a draft law to bolster protections against pesticides and other dangerous chemicals.
Expanded plantations and mining and plans for massive hydropower dams have given rise to concerns for villagers.