Name two medical technologies that have helped combat the spread of disease in cities. Explain how each technology has helped.

Using mobile phones with built-in video cameras helps individuals better manage their diet to prevent obesity and other diet-related diseases. Health promoters also use the media platforms and mobile devices to control behaviors such as smoking, alcohol consumption, exercise, and sexual behaviors. With the use of nanotechnology, scientists hope to prevent illness, more quickly diagnose, control disease and treat disease with fewer side effects, and create better medical aids such as more compatible prosthetics. Nanoparticles and surfaces made of nanostructures are used in many areas of healthcare research.

Explanation:

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).