While it’s well known that plants perceptively respond to proper attention and care, research has shown that plants’ sensitivity may also provide protection against bioterrorist attacks.

Bolstered by a grant from the Pentagon, June Medford, a plant biologist from Colorado State University, Fort Collins, CO, has embarked on an effort to genetically engineer a plant to change color as it senses a biological or chemical agent.

In addition to changing colors, studies show that interior plants can eliminate precarious organic chemicals from sealed test chambers. Plants’ ability to purify air is another mechanism that can be used to protect buildings with air recirculating systems.

Plants can be also be used for security purposes. With proper placement, plants can prevent unwanted entry, they can be terraced for security purposes, and they can be placed in vulnerable areas to deter unwanted activity.