The answer to 'what causes fumigation' is that fumigation is a pest control method that involves treating an entire building or structure with poisonous gases to kill insects, rodents, and other pests. Fumigation is typically used for severe infestations that cannot be adequately treated with other methods, such as termites, bedbugs, or stored product pests. The process involves sealing the structure and releasing a highly toxic gas that penetrates throughout the building to eliminate the pest population.
Fumigation is a complex and dangerous process that should only be performed by licensed, trained professionals. Homeowners should never attempt fumigation on their own, as the gases used are extremely hazardous and can be fatal if not handled properly.