Hello, it's Jamie Lange.

And Sophie Abu, from the book cards.

Well, it's actually Sophie Lange, but that's okay.

From newlyweds, the British Airways Business Class Sale is on huge savings on flights and holidays to the USA and Europe.

You could say it's an elevated flying experience.

Now feast your ears with these discounts, save up to 1,000 pounds on business class flights to the USA.

Package holidays include return business class flights and a hotel stay.

So treat yourself or your loved one, Sophie?

To a well-deserved break, cell ends 13th of November, book at

B.A.com forward slash sale.

Off are subjected to availability. Holidays are at all protected.

Terms and conditions apply.

This is Scientific American 60 Second Science.

I'm Julia Rosen.

Gross Domestic product.

The GDP is a simple way to describe the health of big complicated economies.

And for the last century, the goal of many countries has been to make their GDP go up, but concentrating only on

GDP has had some downsides. In growing the economy we have as an unintended

consequence destroyed parts of nature which are also important for our well-being.

Stephen Pulaski, an environmental economist at the University of Minnesota.

He and his colleagues have created a new measurement, the gross ecosystem product or GEP.

So that we actually have metrics that say, how are we doing on ecosystem management, managing nature, and not just for nature's sake, but how is that coming

...