Explain some of the consequences of the declining populations in the country like south korea and japan.

 A declining population poses serious labour deficiency problems in an economy.
It also strains the economy as more and more of the population become dependent. They either depends on social security fund or on their relatives.

Population decline also decreases investments  in the countries as it diminshes the market for goods and inhibits new ideas.

Mexico has a host of environmental problems, including significant chemicalpollution  from factory discharges and waste dumping, but the main threat to itsbiodiversity  probably stems from  deforestation  and other natural habitat losses. forest habitat is lost for a number of reasons