| Alarm (5) |  |
| Explosion (8) | |
| Insecurity (4) | |
| Threat (1) | |
| Alarm (5) | |
| Explosion (8) | |
| Insecurity (4) | |
| Threat (1) | |
Long Range Acoustic devices (LRAD) are being used as loud hailers to emit warning signals. Audio drones, however, have far more potential in the marketing and entertainment fields.
The key is an alarm pheromone that some species of wild plant have evolved to mimic the chemical warning signals put out by aphids#a major crop pest in the temperate zones
At the top end, it s as if a fire alarm went off in here#we re going to get out
With regard to the cow's well-being and the financial impact caused by the disease warning signals should be intercepted as early
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