Forest fires continue to burn in several parts of Indonesi a. Luckily, a brief rain storm helped break up smoke from some of the fires on Wednesday. The President said rainfall cl eared away much of the smoke in Sumatra. He said the haze was reduced to a level where commercial airline compan ies could operate again. But another official told reporters that much more rain is needed to help put out the fires. Luhut Panjaitan is Indonesia's Coordinating Minister of Politics, Law and Security. "This week we have rain. If we have intensive rain for four straight days and our water bombings continue, I hope we would be back to normal ne xt week. That's our hope, but again it all depends on how much rain we have," he said. The official added that he has asked government agencies to consider the possibility of creating artificial rain. Indonesia has come under heavy pressure from neighboring countries and environmental groups to put out the fires. Every year, some companies set forest fires on purpose. They do this to clear land and make way for palm oil plantations. Thousands of people have developed breathing problems because of the smoke. Some non-governmental organizations plan to take legal ac tion against the government. They say Indonesian officials have ignored the well-being of communities affected by the smoke. The governme nt has deployed more than 22,000 police officers and armed forces members to fight the forest fires. There are more than 1,600 fires burning in at least six provinces. According to this passage, what does the word "haze" mean?