Nearly three out of four students surveyed in the annual Lemelson-MIT Invention Index think high-tech inventions can help solve issues such as climate change and natural-resource depletion within the next 10 years—and 64 percent of them think they could come up with the a-ha moment themselves, compared to 38 percent of adults. The problem? A majority of United States teens say their science education is lacking and that they aren’t prepared to pursue careers in engineering and technology.
Worldchanging.com founder Alex Steffen offers a fast-paced round-up of radical answers to our planet’s greatest challenges, ranging from green cities and buildings, to ingenious tools for the developing world (flowers that detect landmines; straws that purify water as you drink; merry-go-rounds that pump water using the energy expended by children at play).
Peñalosa realized that a city that is a pleasant environment for children and the elderly would work for everyone. In just a few years, he transformed the quality of urban life with his vision of a city designed for people. Under his leadership, the city banned the parking of cars on sidewalks, created or renovated 1,200 parks, introduced a highly successful bus-based rapid transit system, built hundreds of kilometers of bicycle paths and pedestrian streets, reduced rush hour traffic by 40 percent, planted 100,000 trees, and involved local citizens directly in the improvement of their neighborhoods. In doing this, he created a sense of civic pride among the city’s 8 million residents, making the streets of Bogotá in strife-torn Colombia safer than those in Washington, D.C.
Welcome to alt-erlaa, a social-housing complex in Vienna.
Built between 1973 and 1985, this incredible, government funded 27-story complex accomodates approximately 10,000 low-income residents amongst a healthy amount of greenery. As you can see, the blocks are topped with outdoor swimming pools (used regularly by 70% of residents), but the facilities available don’t end there. Others include: indoor swimming pools, fitness rooms, solariums, saunas, tennis courts, schools, 2 medical centres, church, shopping mall, restaurants, 3,400 underground parking spaces and a metro station.
More photos at: Deputy Dog