Lufthansa, Finnair, KLM and British Airways all plan to use a mix of traditional fuel and biofuels made from plants and cooking oil to power their flights.
Beating a regional heat wave with two of nature’s gifts to the Green Mountain state: natural pools and ice cream.
Two can escape to nature in style and luxury with a one-night stay ($166 or $255) at Snoqualmie Falls outside of Seattle. Hike, bike and fish, or take it easy at the links and the spa.
These fairytale fortresses offer trick fountains, curious art collections, dizzying architecture and centuries of history.
SlideshowsThe river of five colours
Experience shades of red, blue, orange and green
The many shades of Santorini
See the Greek isle through its volcanic hues
The land that inspires best-sellers
Discover one of the world’s greatest muses
Welcome to Europe’s cowboy country
Explore a land of rough-and-tumble herdsmen
Our favourite images of the week
Stunning photos from around the world
DestinationsPlunge into Wales’ newest sport
Navigate jagged rock faces – and then jump offWales