It's time to think outside the box. Guest author Cal Innes, Digital Sustainability Specialist at Jisc has collected five unconventional solutions to the climate crisis and discusses whether he thinks they're mad, or genius.

Inefficient sorting means 25 percent of materials end up wrongly in landfills. AI is increasingly helping recycling centres ensure everything ends up where it belongs.

Just as fungi can contribute to the construction of a building, it can also play a part in breaking down demolition debris.

Scientists in Japan hope their innovative building material can provide affordable housing while cutting down on sand use and significantly reducing the number of diapers that end up in landfills.

For many people, tossing garbage into the bin marks the end of their relationship with it. It has now become someone else's responsibility and - if it has not been disposed of properly - someone else’s problem.

A UK app has created a special cash lottery for anyone picking up and binning litter.

Smarter Sorting’s AI-powered platform wants to help drastically cut retail waste, diverting valuable products from landfill and back into recycling and reuse.

Taking the idea of one man's trash being another man's treasure to new lengths, the "omni processor" plant takes literal human waste and turns it into valuable goods - including electricity and clean drinking water.

While Japan presents a sustainability concept for the upcoming 2020 Tokyo Olympics, the country remains in a battle to manage its ever-growing trash mountain - with most of its waste destined for incineration. And other Southeast Asian countries are set to follow suit.