Why are low-density cities are more expensive to build?

Eastern europe and parts of northern europe have which of the following climates?

Countries trade with each other because resources are not evenly distributed across the globe. true or false

Which phrases describe oxygen's roles in earth’s atmosphere? check all that apply. allows fuels to burn forms clouds that produce rain is the gas that animals breathe is used by plants to produce food forms ozone that absorbs the sun's harmful rays