Iroha, Karen, Karen: Human activities/practices increases the greenhouse gasses. When greenhouse gasses increase, the amount of radiation heat absorbed by the Earth's surface, and warms it. Combustion, transportation, agriculture, industry, construction, many human activities releases the gas. Green house gasses are responsible for holding on the heat energy, but by human releasing more gasses, less heat has been escaping to the space. Increase of Greenhouse gasses transform Earth by increase of extreme weathers, higher temperatures, rising sea levels. Also, it affects ecosystems and migration by species happens.