Passive House is a very well-insulated, virtually air-tight building that is primarily heated by passive solar gain and by internal gains from people, electrical equipment, etc. Energy losses are minimized. Any remaining heat demand is provided by an extremely small source. Avoidance of heat gain through shading and window orientation also helps to limit any cooling load, which is similarly minimized. An energy recovery ventilator provides a constant, balanced fresh air supply. The result is an impressive system that not only saves up to 90% of space heating costs, but also provides a uniquely terrific indoor air quality. A Passive House is a comprehensive system. "Passive" describes well this system's underlying receptivity and retention capacity. Working with natural resources, free solar energy is captured and applied efficiently, instead of relying predominantly on ‘active’ systems to bring a building to ‘zero’ energy. High performance triple-glazed windows, super-insulation, an airtight building shell, limitation of thermal bridging and balanced energy recovery ventilation make possible extraordinary reductions in energy use and carbon emission.

What is a Passive House?: "Today, many in the building sector have applied this concept to design, and build towards a carbon-neutral future. Over the last 10 years more than 15,000 buildings in Europe - from single and multifamily residences, to schools, factories and office buildings - have been designed and built or remodeled to the passive house standard. A great many of these have been extensively monitored by the Passiv Haus Institut in Darmstadt, analyzing and verifying their performance. Even governmental agencies have adopted passive house standards in their policy-making (read more about the EU Commision’s intent to implement the Passive House Standard.)."

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UAE poised to become leader in renewable energy. There is no shortage of natural resources in the UAE which holds the world’s sixth-largest oil reserves and has the fifth-largest national gas reserve, a privileged position which has garnered substantial economic benefits for the nation ever since the union in 1971. In recent years, however, with ecological scarcities plaguing the planet, and energy consumption continuously on the rise, the UAE has sought to considerably reduce its dependency on oil. Instead, it has focused on the sustainable development approach, which encourages the use of renewable resources that can be naturally replenished and create pure ‘clean’ energy that can supply electricity, cooling and heating requirements. Indeed, with global energy demand set to double or even triple by 2050, the emirates has demonstrated an unyielding commitment to a renewable energy future, launching a host of initiatives which aim to significantly reduce its carbon footprint. Dubai — A solid ground for sustainability The second largest of the seven emirates, Dubai boasts abundant natural resources — many of which can expedite the delivery of renewable energy. In the past decade, the Government of Dubai has established a slew of plans which aim to reap the benefits of this resource-endowment as well as drive the emirate’s eco-mission and shape the future of global sustainability. One of the most ambitious of these projects is the creation of a multi-billion-dirham solar-energy park managed by the Dubai Water and Electricity Authority (Dewa) and to be completed by 2030. Announced in January 2012, The Mohammed Bin Rashid Al Maktoum Solar Park symbolises a true milestone for the UAE, especially as it intends to reach a capacity output of 1,000 megawatts (MW) by 2030.

UAE poised to become leader in renewable energy - Khaleej Times: "The Mohammed Bin Rashid Al Maktoum Solar Park, which will be managed and operated by Dewa, is instrumental to the DSCE’s Dubai Integrated Energy Strategy 2030 — a long-term programme launched in 2011 which aims to diversify the emirate’s energy mix to include renewable energy and reduce its consumption by 30 per cent by 2030. The strategy is set to diversify the city’s energy production by encouraging potential business opportunities, public-private partnerships and substantial investments. The Dubai Carbon Centre of Excellence (DCCE) — instituted in 2011 — also plays a pivotal role in safeguarding the city’s energy security, offering a wide range of carbon diminution services and consolidated advice to both public and private organisations."

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Update: The world's urban population is expected to surge from just over 3.5 billion now to 4.9 billion by 2030, according to the assessment by the U.N. Convention on Biological Diversity. At the same time, the area to be covered by cities will expand by 150 percent, it said. "Most of this growth is expected to happen in small and medium-sized cities, not in megacities," according to the report, issued to coincide with a U.N. meeting on biodiversity in Hyderabad. More green spaces in cities can filter dust and pollution and soak up heat-trapping carbon dioxide. Some studies have shown that the presence of trees can help reduce asthma and allergies for children living nearby, it said. And the study said that cities were also home to a wide range of animals and plants.

Cities can get greener by 2030 as new urban areas built - U.N. - Yahoo! News Philippines: "More than 65 percent of Poland's bird species are found in Warsaw. In South Africa, Table Mountain national park, rich in wildlife, is surrounded by the Cape Town municipality. In the United States, Saguaro national park is just outside Tucson."Sustainable urban development that supports valuable ecosystems presents a major opportunity for improving lives and livelihoods," said Achim Steiner, head of the U.N. Environment Programme.
More tree cover in cities can help cool them in summers, meaning less need for air conditioning, it said.
"Recent studies highlight the importance of even small urban gardens in providing habitat for native pollinators such as bees, which have declined alarmingly in recent years," the study added."

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