Geografia
- What Is A City?
Cyberschoolbus We all talk about cities and many of us live in one, but what exactly is a city? We often think of the city as a "modern" or recent development, but cities have existed for thousands of years and have their roots in the great...
- Do Ovo à Cidade
Uma interessante analogia entre o crescimento e expansão das cidades e .... o ovo. Uma forma de representar de forma significativa a evolução das cidades ao longo de vários milénios, que se assemelha a um ovo cozido, ao ovo estrelado e ao ovo mexido....
- O Estado Das Cidades Africanas
"The State of the African Cities 2010 goes above and beyond the first report, which provided a general overview of housing and urban management issues in Africa. With the subtitle: Governance, inequity and urban land markets, the report uncovers critical...
- Mapas E Gráficos Sobre Energia E Clima
Population with Access to an Improved Water Source in 2004 In addition to being important for human health, access to an improved water source is indicative of the state of a country's overall physical infrastructure. Access to improved water...
- The Oil Intensity Of Food
THE OIL INTENSITY OF FOOD http://www.earthpolicy.org/Books/Seg/PB3ch02_ss3.htm Lester R. Brown Today we are an oil-based civilization, one that is totally dependent on a resource whose production will soon be falling. Since 1981, the quantity of oil...
Geografia
Crescimento das cidades
How big cities can grow?
In a world of rising temperatures and sea levels, and of rapidly diminishing non-renewable fuel sources, the idea of such compact cities appears attractive. However this argument is never straightforward and might even be flawed. Notwithstanding the fact that individuals want to maximise their use of space – lower densities – while remaining attached to the city which is only possible through sprawl, then the amount of energy saved by moving to a more compact form is rather uncertain. It might appear that using less fuel through travel would reduce energy use, but the added congestion and heat posed by crowding could well offset this gain. Moreover, high densities are not necessarily compatible with ecological stability in cities and it is not clear that high buildings which are part of the drive for compactness are more energy efficient than lower rise structures. In fact as a building gets larger, it is more difficult to resource through natural lighting and direct energy. (Mike Batty)
Ler mais aqui.
- What Is A City?
Cyberschoolbus We all talk about cities and many of us live in one, but what exactly is a city? We often think of the city as a "modern" or recent development, but cities have existed for thousands of years and have their roots in the great...
- Do Ovo à Cidade
Uma interessante analogia entre o crescimento e expansão das cidades e .... o ovo. Uma forma de representar de forma significativa a evolução das cidades ao longo de vários milénios, que se assemelha a um ovo cozido, ao ovo estrelado e ao ovo mexido....
- O Estado Das Cidades Africanas
"The State of the African Cities 2010 goes above and beyond the first report, which provided a general overview of housing and urban management issues in Africa. With the subtitle: Governance, inequity and urban land markets, the report uncovers critical...
- Mapas E Gráficos Sobre Energia E Clima
Population with Access to an Improved Water Source in 2004 In addition to being important for human health, access to an improved water source is indicative of the state of a country's overall physical infrastructure. Access to improved water...
- The Oil Intensity Of Food
THE OIL INTENSITY OF FOOD http://www.earthpolicy.org/Books/Seg/PB3ch02_ss3.htm Lester R. Brown Today we are an oil-based civilization, one that is totally dependent on a resource whose production will soon be falling. Since 1981, the quantity of oil...