Br Br H Halomon The pentahalogenated alkene halomon has been isolated from the red alga Portieria hornemannii and found to have anticancer activity against several human tumor cell lines. Some naturally occurring organohalides are produced in massive quantities. Forest fires,volcanoes,and marine kelp release up to 5 million tons of CH3CI per year,for example,while annual industrial emissions total about 26,000 tons. Termites are thought to releaseas much as 108 kg of chloroform per year.The pentahalogenated alkene halomon has been isolated from the red alga Portieria hornemannii and found to have anticancer activity against several human tumor cell lines. Some naturally occurring organohalides are produced in massive quantities. Forest fires, volcanoes, and marine kelp release up to 5 million tons of CH3Cl per year, for example,while annual industrial emissions total about 26,000 tons. Termites are thought to releaseas much as 108 kg of chloroform per year