Should the US follow the EU's cap-and-trade scheme regarding aviation emissions?
On November 13, 2007, the European Parliment voted to go ahead with a plan to cap carbon dioxide emissions for all aircraft operating to or from EU airports. Airlines may trade pollution credits like other industries do now, but the gist of the rule is that aircraft operators must clean up and reduce emissions. The US Environmental Protection Agency has received a petition from several environmental organizations and states demanding regulation of aircraft emissions, similar to the EU plan. What are the ramifications of such regulation?
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Here are 7 often-overlooked World Heritage Sites, each with its own history.
- UNESCO World Heritage Sites are locations of high value to humanity, either for their cultural, historical, or natural significance.
- Some are even designated as World Heritage Sites because humans don't go there at all, while others have felt the effects of too much human influence.
- These 7 UNESCO World Heritage Sites each represent an overlooked or at-risk facet of humanity's collective cultural heritage.
Famous physicists like Richard Feynman think 137 holds the answers to the Universe.
- The fine structure constant has mystified scientists since the 1800s.
- The number 1/137 might hold the clues to the Grand Unified Theory.
- Relativity, electromagnetism and quantum mechanics are unified by the number.
A new method promises to capture an elusive dark world particle.
- Scientists working on the Large Hadron Collider (LHC) devised a method for trapping dark matter particles.
- Dark matter is estimated to take up 26.8% of all matter in the Universe.
- The researchers will be able to try their approach in 2021, when the LHC goes back online.
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