The river labeled "d" is the second longest in europe and passes through ten countries.

What is the result of the greenhouse effect? a. heat is deflected from the atmosphere. b. heat is released from the atmosphere. c. heat is kept in the atmosphere. d. plants are able to grow in the tropics where the air is the heaviest.

Which statement best describes how chemical equations demonstrate conservation of mass?

Formidable obstacles of climate, terrain, and distance hinder exploitation of natural resources in russia. true false