The problem under consideration is further discussed under three sections.In the first section,the economic significance of slopelands in South Chins is re-examined in the light of additional information.Special reference is made to the possible reduction of arable laad resulting from the rise of sealevel that may occur as a consequence of global warming.The present productivity of land on the slopes of hills and mountains is very low.Higher productivity will no doubt lead to a decrea.se of CO₂ in the atmosphere.As the slopes are mostly well drained,the generation of other "greenhouse" gases can be easily kept to a minimum.