published_or_final_version / Urban Planning / Master / Master of Science in Urban Planning

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Biodiversity and ecosystem service losses driven by land-use change are expected to intensify as a growing and more affluent global population requires more agricultural and forestry products, and teleconnections in the global economy lead to increasing remote environmental responsibility. By combining global biophysical and economic models, we show that, between the years 2000 and 2011, overall population and economic growth resulted in increasing total impacts on bird diversity and carbon sequestration globally, despite a reduction of land-use impacts per unit of gross domestic product (GDP). The exceptions were North America and Western Europe, where there was a reduction of forestry and agriculture impacts on nature accentuated by the 2007-2008 financial crisis. Biodiversity losses occurred predominantly in Central and Southern America, Africa and Asia with international trade an important and growing driver. In 2011, 33% of Central and Southern America and 26% of Africa's biodiversity impacts were driven by consumption in other world regions. Overall, cattle farming is the major driver of biodiversity loss, but oil seed production showed the largest increases in biodiversity impacts. Forestry activities exerted the highest impact on carbon sequestration, and also showed the largest increase in the 2000-2011 period. Our results suggest that to address the biodiversity crisis, governments should take an equitable approach recognizing remote responsibility, and promote a shift of economic development towards activities with low biodiversity impacts.

Thesis (M. Phil.)--University of Hong Kong, 2005. / Also available in print.

Thesis (Honors)--Liberty University Honors Program, 2008. / Includes bibliographical references.

This thesis discusses the role of Environmental Impact Assessments in the implementation of the concept of sustainable development within the realm of North-South tensions regarding responsibilities for environmental conservation. Environmental Impact Assessments provide opportunities for realizing sustainable development not only because they operationalize the integration principle of sustainable development by facilitating the equilibrium between development and environmental conservation objectives, essential for ecological sustainability, but also because, in allowing for public participation in the assessment process, they promote the realization of the civil right of participation in public affairs, an essential component of good governance required for sustainable development to thrive. However, the thesis scrutinizes the reality in developing countries of adopting Environmental Impact Assessments. They are not yet accorded a lot of value because it is foreign technology imported from the North, which must be adopted often as a conditionality to that much needed development assistance, which often does not take into account cultural realities in developing countries and which inadvertently plays a role in the growth of Third World debt, corruption and erosion of sovereignty in the Third World. It argues, therefore that the utility of Environmental Impact Assessment in the realization of global sustainable development is limited by the existence of these realities unless modifications are made in the implementation of Environmental Impact Assessments in developing countries.

Ammonia as a transportation fuel offers a carbon-free, hydrogen rich energy source that emits no greenhouse gases in combustion, and has no global warming potential. Furthermore, it may be produced from any renewable energy resource, and is a strong option for long term sustainability. Ammonia also provides a pathway towards a hydrogen economy, which is the long term goal for environmental sustainability. This thesis investigates the feasibility of integrating ammonia as a combustion fuel, hydrogen carrier, heat recovery and working fluid, and for indirect engine cooling, within locomotive propulsion systems for nine novel ammonia-based configurations. Thermodynamic, environmental, and economic analyses are conducted for a typical modern diesel-fueled locomotive and the proposed ammonia configurations. The study comparatively assesses potential long term solutions for sustainable, clean rail transportation. From the modeled results, the proposed systems operating with 50% of required fuel energy replaced by ammonia have a reduction in diesel fuel consumption from 0.211 kg/s to less than 0.10 kg/s. This is associated with a reduction in GHG emissions of more than 8 tonnes CO2eq for a typical daily locomotive duty cycle for commuter operation. Criteria air contaminants are reduced to below upcoming Tier 3 emission levels for NOx and HC emissions, and meet current levels for PM emissions. In total, ten locomotive propulsion systems are investigated including the diesel-fueled locomotive baseline, and the performance gains are considered against economic factors for fuel and equipment costs in a comparative assessment.

No description available.

Thesis (Ph.D.)--Harvard University, 2007. / Adviser: Dale W. Jorgenson. Includes bibliographical references.