• Geoengineering may lead to whiter sky

    One idea for fighting global warming is to increase the amount of aerosols in the atmosphere, scattering incoming solar energy away from the Earth’s surface; scientists, however, theorize that this solar geoengineering could have a side effect of whitening the sky during the day

  • Groundwater depletion in Texas, California threatens US food security

    The U.S. food supply may be vulnerable to rapid groundwater depletion from irrigated agriculture; for example, from 2006 to 2009, farmers in the south of California’s Central Valley depleted enough groundwater to fill the U.S. largest man-made reservoir, Lake Mead near Las Vegas — a level of groundwater depletion that is unsustainable at current recharge rates

  • Removing CO2 from the flues of coal-fired power plants

    The current method of removing the greenhouse gas carbon dioxide (CO2) from the flues of coal-fired power plants uses so much energy that no one bothers to use it; scientists have developed an entirely new catalyst for separating out and capturing CO2, one that mimics a naturally occurring catalyst operating in our lungs

  • Explaining uneven rise in sea levels

    If there is a global warming trend, one of its consequences would a rise in sea levels, which will require massive mitigation efforts to protect coastal infrastructure; rather than a uniform rise in sea level, however, the records show sea levels rising in some areas and dropping in others; Harvard researchers offer an explanation for this phenomenon

  • Solving southwest U.S. water shortage by water cap and trade?

    Lake Mead, on the Colorado River, is the largest reservoir in the United States, but users are consuming more water than flows down the river in an average year, which threatens the water supply for agriculture and households; researchers suggest that to solve this imbalance, a water cap-and-trade system, successfully implemented in Australia, should be considered for interstate water trading

  • Groundwater pumping causes sea level rise, canceling out effect of dams

    Those in charge of infrastructure protection must now worry about another source of sea level rise: water pumped out of the ground for irrigation, drinking water, and industrial use; this water ends up emptying into the world’s oceans, and scientists calculate that by 2050, groundwater pumping will cause a global sea level rise of about 0.8 millimeters per year

  • Groundwater pumping causes sea level rise, canceling out effect of dams

    Those in charge of infrastructure protection must now worry about another source of sea level rise: water pumped out of the ground for irrigation, drinking water, and industrial use; this water ends up emptying into the world’s oceans, and scientists calculate that by 2050, groundwater pumping will cause a global sea level rise of about 0.8 millimeters per year

  • NASA's new carbon-counting instrument ready for lift-off

    Carbon dioxide is the most significant human-produced greenhouse gas and the principal human-produced driver of climate change; new NASA spacecraft will uniformly sample the atmosphere above Earth’s land and ocean, collecting more than half a million measurements of carbon dioxide concentration over Earth’s sunlit hemisphere every day for at least two years

  • The American West running low on water

    The American West has a drinking problem; on farms and in cities, people who live in that region are guzzling water at an alarming rate; scientists say that to live sustainably, they should use no more than 40 percent of the water from the Colorado River Basin; currently, however, they use 76 percent, nearly double the sustainable benchmark

  • Little of Earth’s water is usable in everyday life

    Very little of Earth’s water is usable in everyday life; about 96 percent of water on Earth is saline; of the total freshwater, over 68 percent is locked up in ice and glaciers; another 30 percent of freshwater is in the ground; rivers are the source of most of the fresh surface water people use, but they only constitute about 300 mi3 (1,250 km3), about 1/10,000th of one percent of total water

  • Panetta: Environment is becoming a national security concern

    Climate and environmental change are emerging as national security threats that weigh heavily in the Pentagon’s new strategy; the secretary also said he has great concern about energy-related threats to homeland security that are not driven by climate change

  • Bomb-sniffing dogs used in Everglades python invasion

    Burmese pythons have invaded the Florida Everglades, adapting well to the Everglades environment; they have also been wreaking havoc with the delicate ecosystem of the area; now, there is a new weapon in the fight against the Burmese python: dogs, trained to sniff out explosives, are being re-trained to locate the Burmese python

  • Australians told sweeping economic, societal changes needed to cope with severe weather

    The Australian government’s Productivity Commission has just released its much-anticipated report, titled Barriers to Effective Climate Change Adaptation; the report calls for sweeping changes across the Australian economy, including ditching property taxes which discourage people from moving out of areas prone to extreme weather events

  • Identifying the sources of global sea level rise

    As the Earth’s climate warms, a melting ice sheet produces a distinct and highly non-uniform pattern of sea-level change, with sea level falling close to the melting ice sheet and rising progressively farther away. The pattern for each ice sheet is unique and is known as its sea level fingerprint; now, geophysicists have found a way to identify the sea level fingerprint left by a particular ice sheet

  • New monitoring system clarifies atmospheric CO2 questions

    Most climate scientists believe higher concentrations of the greenhouse gas CO2 in Earth’s atmosphere are leading to rising temperatures on the planet; trouble is, CO2 is derived not only from fossil fuels, but is also being emitted by biological sources like plant respiration; CO2 released from fossil fuels has no carbon-14, while CO2 emitted from biological sources on Earth is relatively rich in carbon-14, allowing scientists to compare emissions from man-made fossil fuels to biologically emitted CO2