'Heat of hell': Saudi sun challenges hajj pilgrims

Mobile phones are overheating and the pavement feels like a frying pan but for Abdul al-Assad, intense desert heat is all part of the hajj pilgrimage in summertime Saudi Arabia.

What Canadian wildfires signify for climate, public health

Smoke from hundreds of wildfires in eastern Canada shrouded the Northeast and Midwest in a dense ochre haze this month, and more smoke could return to both regions of the United States this week as the conflagrations continue.

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