In 2003 a human-caused wildfire destroyed nearly 300,000 acres in southern California. Several of the series of wildfires that ripped through the state in 2007, destroying more than 500,000 acres, were also started by humans. One out of every 10 wildfires is caused by a careless smoker. In persistent hot and dry weather (which has increased greatly in many regions of the world), a simple brush fire can quickly grow into a major disaster that burns for days, destroys habitat and homes, and costs billions in resources.
Do not smoke when walking in the woods, and never throw cigarette butts out of your car window, even if you think you have stubbed them out.
-Abrams, “365 Ways To Save The Earth”, 2008