Amazon is swiftly becoming a ______ retailer by letting other companies sell products on its site.

Smarter consumers know which products have a good _______ and which do not.

Other transformations in the retail business are ______ to follow the trend of Amazon.

Greenhouse gases are being released into the atmosphere 30 times faster than the time when the Earth experienced a ______ episode of global warming.

The stores run by Sony and Apple, for instance, are there for people to try out _______ and to ask questions to knowledgeable staff.

Online shoppers now read not only the sales _______ but also reviews from previous purchasers.

It seems the Earth's climate passes a _______ beyond which climate change accelerates with the help of positive feedbacks - vicious circles of warming.

"This will be the same amount of carbon released into the atmosphere from cars and industrial emissions over the next 300 years if present ____ continue", Zachos said.

The ocean is capable of removing carbon, and quickly, but this natural process can be easily ______.

Far from becoming ______ online shoppers are very demanding.

The ocean is capable of removing carbon, and quickly, but this natural _____ can be too much.

James Zachos, a professor in Santa Cruz California, said the speed of the present buildup of greenhouse gases is far greater than during the global warming after the ______ of the dinosaurs.