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For this reason, Wright, Kemp, and Williams, have suggested to define the carbon footprint as: ) emissions of a defined population, system or activity, considering all relevant sources, sinks and storage within the spatial and temporal boundary of the population, system or activity of interest.

Calculated as carbon dioxide equivalent using the relevant 100-year global warming potential (GWP100).

Greenhouse gases (GHGs) can be emitted through land clearance and the production and consumption of food, fuels, manufactured goods, materials, wood, roads, buildings, transportation and other services.

For simplicity of reporting, it is often expressed in terms of the amount of carbon dioxide, or its equivalent of other GHGs, emitted. fuel burned to produce goods far away from the final consumer.

Surrounding the pulsar lies a mix of material; some of it was originally expelled from the star before it went supernova, and the rest was ejected during the explosion itself.

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We need carbon, but that need is also entwined with one of the most serious problems facing us today: global climate change.Parts of the carbon cycle may even amplify these short-term temperature changes.The uplift of the Himalaya, beginning 50 million years ago, reset Earth’s thermostat by providing a large source of fresh rock to pull more carbon into the slow carbon cycle through chemical weathering.Forged in the heart of aging stars, carbon is the fourth most abundant element in the Universe.Most of Earth’s carbon—about 65,500 billion metric tons—is stored in rocks.

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