Consider the following activities: 1. Spraying pesticides on a crop field 2. Inspecting the craters of active volcanoes 3. Collecting breath samples from spouting whales for DNA analysis At the present level of technology, which of the above activities can be successfully carried out by using drones?
Explanation
Statement 1 is Correct: Drones (Unmanned Aerial Vehicles) are widely used in precision agriculture for the targeted spraying of pesticides and liquid fertilizers, which helps in reducing chemical waste and minimizing human exposure to toxins. Statement 2 is Correct: Drones equipped with thermal cameras and gas sensors are used to inspect the craters of active volcanoes, allowing scientists to gather data from hazardous environments that are inaccessible or too dangerous for humans. Statement 3 is Correct: Researchers use specialized drones (such as the 'SnotBot') to fly through the blow (breath) of spouting whales to collect biological samples containing DNA, hormones, and microbiomes for non-invasive health monitoring.