‘I’ve always been a rebel’ – Vivienne Westwood on squaring environmental activism with selling fashion

Why playing cards can save the planet and the pure bliss of falling in love – Jess Cartner-Morley meets queen of punk and her co-designer and husband

Totes amaze: Anya Hindmarch on her ‘plastic bag’ and eco-fashion

The fashion designer’s famous bag inspired the world to say ‘no’ to plastic. Her new one takes direct action

Luxury travel: 50 wealthy tourists, eight countries … and one giant carbon footprint

Despite the climate crisis, ‘no emission spared’ round-the-world holidays in private jets are selling out

Karl Lagerfeld remembered by Carine Roitfeld

10 September 1933 – 19 February 2019
The French fashion editor remembers a passionate man of ideas who always remembered the small details

• Mary Warnock remembered by Onora O’Neill
• Read the Observer’s obituaries of 2019 in full

Twenty tech trends for 2020

From new gaming consoles to activism at Apple, we predict the things you will – or won’t – see in tech this year

Christmas gift ideas for food lovers 2019

From stocking fillers to hampers, great Christmas presents for foodies, selected by Observer Food Monthly