costs may vary costs me costs me nothing costs money costs more costs more than you costs much costs much less costs necessary costs need costs needed costs not costs not included costs nothing costs now costs of administering costs of air costs of building costs of buying costs of capital costs of care costs of climate change costs of compliance costs of construction costs of developing costs of different costs of doing business costs of education costs of electricity costs of energy costs of environmental costs of establishing costs of goods costs of health care costs of holding costs of implementation costs of implementing costs of inaction costs of international costs of living costs of maintaining costs of maintenance costs of making costs of materials costs of medical costs of new costs of obtaining costs of operating costs of operation costs of participation costs of producing costs of production costs of providing costs of research costs of running costs of services costs of the action costs of the operation costs of the proceedings costs of the war costs of training costs of transport costs of transportation costs of travel costs of treatment costs of using costs of violence costs of war costs on average costs only costs or benefits costs other costs over time costs paid costs per employee costs reduced costs reduction costs reflect costs relate costs related costs relating costs relative costs remain costs represent costs required costs result costs resulting costs rise costs roughly costs savings costs shall costs shall be borne costs should costs should not costs still costs such costs that can costs that you costs time