face challenges - having to deal with difficult situations which put you at test , growth miracle - greater happinness for millions of people, doom - terrible fate , destruction, death , overpopulation - too many people for the environment to sustain , to starve - to be deprived of access to food, fertility - the birth rate of a population, to underestimate - to misjudge, wrongly assess , eventually - in the end, to have potholes - have depressions in a road surface, to slump - ( of prices,sales) to fall suddenly, to harvest - to collect the crops , gather large quantities of information, commodity - a product which can be traded, valuable quality, to be faced with decision - be confronted with the need to take a stance, to spread ideas - to proliferate concepts , unproductive - not achieving much , not very useful, to curb the threat of - to act in order to limit or restrain intention to hurt or damage , be accountable for - be responsible for ,

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