Điền từ ngữ thích hợp Many environmental experts are pessimistic about the future of our (1).......................They say that in the next few years (2) ...........chemicals will further damage the (3)................layer, there will be more losses of irreplaceable tropical rainforests and serious air pollution will cause the (4)............ itself to change. They also warn us that the developing countries will countinue to suffer ecological disasters, while the (5).......... countries cosume the vast of the world's fuels. Animals are also at (7)..............It is feared that some endangered species may soon die out , as their natural (8)..........are destroyed .