thực ra, nguyên nhân khách quan chỉ là phần nhỏ trong nguyên nhân gây ô nhiễm môi trường toàn cầu: lũ lụ, các hoạt động tự nhiên như cháy rừng, núi lửa ảnh hưởng đến bầu khí quyển gây ô nhiễm không khí
in fact, the objective causes is only a small part in the cause of global environmental pollution: lụ flood, natural activities such as forest fires, volcanoes affect the atmosphere cause atmospheric pollution
in fact, objective causes only a small part of the cause of global environmental pollution: Lu Lu, natural activities such as forest fires, volcanic eruptions affect the atmosphere causing air pollution
In fact, the objective reason is the cause of a small part of the global environmental pollution l group activities, natural forest fires, volcano effect of atmospheric air pollution