What is a serious problem of Lake Baikal in Russia?

3/40

It contains a rich variety of animals and plants.

It is polluted by massive volumes of industrial wastes discharged into it.

It has 1,300 rare species that do not exist anywhere else in the world.

The government did not have the power to enforce laws and regulations.

Giải thích

Đáp án đúng là: B

Giải thích: Dựa vào câu: But they are being destroyed by the massive volumes of industrial effluent which pours into the lake everyday.

Dịch: Nhưng chúng đang bị phá hủy bởi khối lượng lớn nước thải công nghiệp đổ vào hồ hàng ngày.