Global warming, population growth, and natural resources for food production.
D000383:Agriculture; D000569:Americas; D002245:Carbon Dioxide; D055598:Chemical Phenomena; D002621:Chemistry; D002980:Climate; D003247:Conservation of Natural Resources; D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D004467:Economics; D004736:Energy-Generating Resources; D004777:Environment; D004787:Environmental Pollution; D005069:Evaluation Studies as Topic; D005523:Food Supply; D017752:Greenhouse Effect; D009656:North America; D009930:Organic Chemicals; D011153:Population; D011157:Population Dynamics; D011158:Population Growth; D013672:Technology; D014481:United States; D014881:Water Supply
D009930:Organic Chemicals; D002245:Carbon Dioxide
Agriculture; Americas; Carbon Dioxide; Climate--changes; Critique; Deforestation; Demographic Factors; Developed Countries; Developing Countries; Economic Factors; Energy Supply; Environment; Environmental Degradation; Food Supply; Global Warming; Ingredients And Chemicals; Macroeconomic Factors; Natural Resources; North America; Northern America; Organic Chemicals; Population; Population Dynamics; Population Growth; Soil Degradation; Technology; United States; Water Supply; World