What the experts say: how to make our cities more sustainable

Catch-up on the highlights from our recent panel discussion on sustainable cities, including why it is a myth that Spaniards don’t cycle

Extra virgin ‘100% real’ olive oil goes on sale in UK

French Querubi oil, claiming to be produced without insecticides or fertilisers, aims to stand out in an industry plagued by fraud

Can a hashtag change the fashion industry?

On Fashion Revolution Day, people will take to social media to ask brands #whomademyclothes, but critics say hashtag activism makes little difference

The answer lies in the soil and pesticides

Letters: A major research study by Newcastle University published last year found not only that organic fruit and veg contains more beneficial nutrients, but also four times less pesticide residues

Earth hour: millions will switch off lights around the world for climate action

Annual switching off of lights in homes, businesses and landmarks holds extra significance ahead of this year’s climate talks in Paris, says the UN secretary general, Ban Ki-moon

Company offers rain-free wedding days for £100,000

A luxury holiday company is offering to use geo-engineering to guarantee ‘fair weather and clear skies’ – for a starting price tag of £100,000