What factors were responsible for environmental improvements in eastern europe during the 1990s?

Compare demographic and environmental effects of the columbian

Which anatomical feature would you expect to find in the fossil remains of a nocturnal species?

When reading a textbook blank. a) it’s safe to assume that the ingot is not biased b) you should watch for fallacies in information and author bias c) you should fact check everything you read d) it is understood that academic sources are not biased