…hours. Projecting electricity demand matters because it influences investments in capacity. Accurate projections might have lessened the pain for the utilities, which ordered and then canceled plants; the equipment suppliers,…
Our Census of Marine Life colleagues exploring Australia ’s reefs have discovered hundreds of undescribed corals and other species, including a little animal that eats the tongues of fish. Browse…
…Greater wealth enables people to buy higher speed, and when transit quickens, cities spread. Both average wealth and numbers will grow, so cities will take more land. What are the…
…requires micro- or zero emissions per unit of economic activity to maintain or enhance environmental quality In other words, Americans need to clean processes by more than one order of…
…was little farming in California and Australia, and key technologies did not yet exist or were not widely applied to impound and transport water, or to transport and store agricultural…
…ETH-Lausanne, Switzerland, 30 August 1996. URL https://sentenext1.epfl.ch/swissmetro. [18] U.S. Department of Transportation, Compendium of Executive Summaries from the Maglev System Concept Definition Final Reports, DOT/FRA/NMI-93/02, pp. 49-81, March 1993. On-line at https://www.bts.gov/smart/cat/CES.html…
The entire issue of Population and Development Review with our article about Peak Farmland is now online: Population and Public Policy: Essays in Honor of Paul Demeny https://www.popcouncil.org/publications/books/2012_PDRSuppPopPublicPolicy.asp and will…
…far, in a free online service (https://www.eol.org/). “There are expectations of 8 to 50 million more species out there that we haven’t identified yet,” Edwards said. Other experts’ estimates of…
…averaged about one hour of walking per day. The essence is that the transport system and the number of people basically determine covered land.[xii] Greater wealth enables people to buy higher…
…Improved tractors, low tilling, targeted herbicides and pesticides, and an extended capacity for N fixation might reduce energy consumption in agriculture by an order of magnitude. Lifting yields while minimizing…