Will eating organic food make you healthier?

A major new study has found that organic foods contain higher levels of antioxidants and less harmful chemicals than conventionally farmed produce. But does that mean they are better for you? With your help, Karl Mathiesen investigates.

Let us know your thoughts. Post in the comments below, email karl.mathiesen.freelance@theguardian.com or tweet @karlmathiesen

Do farmers really need bee-harming insecticides?

Syngenta says some farmers have no choice but to use banned neonicotinoids, which are linked to declining bee populations. But is it true that no alternatives exist? With your help, Karl Mathiesen investigates.

Let us know your thoughts. Post in the comments below, email karl.mathiesen.freelance@guardian.co.uk or tweet @karlmathiesen

Rubbish futures: can technology help us reach zero waste?

Turning dug-up waste into gas or converting rubbish into building materials are among new techniques that may help end landfill