What humans produce as waste comes back to us? Explain this statement with an example in terms of air pollution.

Pollutants can cause respiratory illnesses and allergies ranging from coughs to asthma, cancer or emphysema. Inhalation of toxic agents directly affects the lungs and other organs that make up the respiratory system. Also, poor oxygenation can lead to cardiovascular problems.

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).

a- all cells come from pre-existing cells