Australia became the first country in the world to repeal a carbon tax on the nation's worst greenhouse gas polluters, as Prime Minister Tony Abbott made good on a campaign promise to get rid of the unpopular law.
The Senate voted 39 to 32 to eliminate the tax enacted by the previous center-left government two years ago. The law imposed the equivalent of a $22.60 tax per metric ton of carbon dioxide emissions on about 350 of the nation's worst polluters.
Originally published on Thu July 17, 2014 10:47 am
We often think about people spreading diseases around the world. This spring,vacationers brought chikungunya from the Caribbean to the United States. Businessmen have likely spread Ebola across international borders in West Africa. And health care workers have carried a new virus from the Middle East to Asia and Europe.
The menus of millennia past can be tough to crack, especially when it comes to fruits and vegetables. For archaeologists studying a prehistoric site in Sudan, dental plaque provided a hint.
"When you eat, you get this kind of film of dental plaque over your teeth," says Karen Hardy, an archaeologist with the Catalan Institute for Research and Advanced Studies at the Universitat Autonoma de Barcelona.