Summary
- Smoke from wildfires in the Amazon rainforest and other parts of Brazil is choking major cities like Sao Paulo and Rio de Janeiro
- Satellite images show that 60% of Brazil has been affected by smoke, with neighboring countries also impacted
- Sao Paulo was ranked as the world’s most polluted major city on Monday
- Human actions, exacerbated by the worst drought in seven decades, are blamed for recent fires