Nitrogen and oxygen are the main constituents of the atmosphere plus water vapour near the surface. Carbon dioxide is present in smaller amounts butgl of course it can have a profound influence on the climate as global warming has shown, Greenhouse gases include water vapour, carbon dioxide, methane and nitrous oxide.
Answer: noun
Explanation:the study of the physical features of the surface of the earth and their relation to its geological structures
*low temperatures
*short growing seasons/bad to grow crops
*treeless
*snowy
*found in top of mountains
*few plants and animals
