Choking China: The struggle to clear Beijing's air
As pollution levels return to normal in China's capital after a record-breaking month of smog, what can be done to banish the smog?
New Scientist
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Can coal live up to its clean promise?
Coal is our cheapest and most abundant source of fossil-fuel energy. We probably have enough to keep the world powered for hundreds of years.
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Chief scientist revolts over biofuel legislation
Could biofuels do more damage to the climate than the fossil fuels they replace?
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San Francisco to boast the greenest buildings
San Francisco may soon boast the greenest buildings in the US.
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'Repaired' kidneys could ease organ shortage
It is a grim dilemma: spend years more on a kidney transplant waiting list, and possibly die before you ever reach the top, or accept a diseased organ that has been patched up.
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White House ignored air quality advice
For many researchers, the Bush administration will be best remembered for the way it has manipulated scientific advice for political ends.
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Rising temperatures bring their own CO2
Climate sceptics are right. Temperature increases do precede rises in atmospheric carbon dioxide - the opposite of what you would expect if changes in CO2 levels were really driving climate change.
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Editorial: Time for a new agricultural revolution
Growing food has always been a struggle, and it is only thanks to modern agricultural research that most people now have enough to eat. Today we need that research more than ever.
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Killer wheat fungus threatens starvation for millions
A wheat disease that could destroy most of the world's main wheat crops could strike south Asia's vast wheat fields two years earlier than research had suggested, leaving millions to starve.
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Editorial: Do bacteria control our weather?
We have all heard tales of frogs, toads and fish raining from the heavens: these are rare events triggered by freak weather.
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City weeds evolving to stay close to home
Hunkering down is the safe option if leaving home is risky, but it's a strategy that could leave you out on an evolutionary limb.