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fifteen    音标拼音: [fɪft'in] [f'ɪft'in]
num. 十五,15

十五,15

fifteen
十五

fifteen
adj 1: being one more than fourteen [synonym: {fifteen}, {15}, {xv}]
n 1: the cardinal number that is the sum of fourteen and one
[synonym: {fifteen}, {15}, {XV}]

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    We emphasize an open definition of urban systems that accounts for the exchanges of material and influence between cities and surrounding landscapes Re-search on ecology in urban systems highlights the nature of the physical environment, including urban climate, hydrology, and soils
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    The concept recognizes that cities are not devoid of nature but are complex ecosystems at the intersection of the natural and constructed worlds The Importance of Life in the City The living organisms within a city provide environmental services that make urban areas more habitable Vegetation improves air quality by absorbing pollutants and
  • The ecological future of cities | Science - AAAS
    Today, urban ecologists have greatly expanded their scope of study to include ecological and socioeconomic processes, urban management, planning, and design, with the goal of addressing issues of sustainability, environmental quality, and human well-being within cities and towns
  • Bio-cities: investing in nature for urban change | Lombard Odier
    Despite covering just 2% of the terrestrial surface, urban areas use 75% of the natural resources we consume 1 Towns and cities are also responsible for 70% of global CO₂ emissions 2 and 75% of energy-related emissions 3, caused largely by transport and the lifecycle of buildings (including construction and day-to-day operations) Cities are an outsized cause of climate change and the





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