Describing friends,discussing cause and effect How do you think the world will be different in 50 years?
Talking about trends will reach 8 billion. ...has increased steadly. There has been a huge rise in the number of... There'll be a gradual increase in ...
The fact that the population is increasing is probably a result of... The drop in the birthrate is most likely due to... The increase in the number of older people could be an effect of..
Speculating about affairs I think the rise in the population of hte developing world is going to create The decrease of the birthrate will probably cause ... The fall of the number of the people of working age could lead to...