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spec: Do we have the data to allow our leaders to make informed decisions ? For more than ten years Tufts has hosted two annual meetings of its International Board of Overseers . But the risks are there , and we must be prepared for that . Globally , sea level rise and agricultural disruption will not be the only causes of human migration . These include clean coal technologies and ‘ carbon capture ’ ( removing emissions directly from industrial or utility plant exhausts and storing them in secure reservoirs such as deep saline aquifers ) . Why are people so superstitious ? Investment in urban infrastructure is essential to mitigate existing problems and to prevent exacerbation of the pressures exerted on urban areas by rapid population growth and migration . Such areas include town and cities , coastal regions , and the vicinity of lakes and rivers . It 's better to give them too much than too little . In some respects , it used to be simple . For example , desertification and drought are directly linked to poverty , food and water shortages , conflict and mass migration . Kelley explains why these new rules should interest producers and processors as well as consumers . Economists are constantly refining methods to evaluate the costs of air pollution – and hence the benefits of abatement measures – due to impacts such as mortality and morbidity among humans ; damage to ecosystems , agriculture and materials ; and visibility impairments . Utah have done . The widely used ‘ damage function ’ approach , for instance , measures the impact of abatement measures on human health using epidemiological studies and information on real or projected changes in ambient air pollutant concentrations resulting from abatement measures and population exposure levels . Water Drops , a collection of Sigourney 's prose and poetic work , is a temperance tract principally intended to help mothers influence their children against drink . Many African countries have implemented air quality standards and pollution abatement regulations , but integrated planning and investment in infrastructure development remain priorities for urban areas . The agriculture sector highlights perhaps more clearly than any other the extent and severity of potential impacts of climate change on food production , food security , lost livelihoods , environmental damage and environmental migration . This volume is a religious tract , combining story and sermon , of the type that was widely distributed in the antebellum period .