A quick, DIY solution to keep you safe on a smoky day

Air purifiers can cost a lot, so why not make your own for less money? We meet a group of seniors in Vancouver’s Chinatown learning to build their own air cleaners – and hear why the workshop they’re attending does more than support physical health. Then – a historian unearths lessons about handling heat across centuries in the Middle East. He argues we need to make sweating sexy again.