long-term alterations in weather patterns due to natural or human forces, CLIMATE CHANGE, changing weather patterns brought about specifically by human activity, GLOBAL WARMING, removal of trees, which are not subsequently replaced, DEFORESTATION, energy that will not run out-e.g. energy from water, sun and wind, RENEWABLE ENERGY, kind of living which can be maintained infinitely-e.g. by using renewable energy, SUSTAINABLE living, when gas such as CO2 is trapped in the atmosphere, thus creating intense heat, GREENHOUSE EFFECT, carbon-based materials, which, when burned, release CO2 into the atmosphere, CARBON FOOTPRINT, when an individual, or a group take measures to neutralize their CO2 emission (e.g. by planting trees), CARBON NEUTRAL.

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