Disappearing forests throughout Latin America, Asia and Africa can cause ______.

A．only rich countries can afford to care about environmental problems
B．developing countries should also be thinking about the environment
C．environmental problems exist only in the rich world
D．rich countries have not paid enough attention to the health of the planet

A．analyzing the difference between the environmental problems in rich and poor countries
B．arguing why developing countries should take immediate action to deal with their environmental problems
C．demonstrating how serious damage pollution can cause to a country's economic development
D．explaining why the developed world's environmental concerns have little to do with immediate threats