Which is not a disadvantage of the use of solar energy? A; less energy produced on cloudy days
B; potential impact on bird populations
Please its for my test :(

When a nation depletes its natural resources, it often experiences rapid decline because it:

Which of the following is an example of one of the successes of the marshall plan? a. a few eastern european countries decided to turn to democracy. b. western european economies were stronger than they had been before wwii. c. borders between western and eastern european countries shifted. d. eastern european countries eventually took part in the plan. ( answer in the format above so i can understand)

Who introduced arabic numerals to italy, which make bookkeeping possible? a. brunelleschi b. cosimo de medici c. fibonacci d. gregory xi e. giovanni de bicci de medici