The picture is from Kuala Lumpur, Malaysia (sp?). On the left the sky is a normal summer sky and on the left what it looks like today.
Apparently Indonesian farmers burn down their fields and forests to make way for new fields and the pollution goes over kuala lumpur. People have to use face masks when outdoors. The Air Pollution Index (API) is 529. Anything over 300 is considered dangerous.
Looks pretty bad...
BBC News