500 years ago, how many children died before the age of 5 due to disease?

Environmental science are unconsidered with methods to preserve natural resourcesa. trueb. false

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures

Why is taking care of yourself a time management techique