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Human activity increases greenhouse gas emissions, which contribute to the greenhouse effect. The main anthropogenic greenhouse gas is carbon dioxide, which is a by-product of fossil fuel combustion. It's also produced during deforestation and clearing for agriculture. In recent years, the concentration of CO2 in the atmosphere has risen. This means that the concentration will be more than twice the pre-industrial level by mid-century.

Produktbeschreibung
Human activity increases greenhouse gas emissions, which contribute to the greenhouse effect. The main anthropogenic greenhouse gas is carbon dioxide, which is a by-product of fossil fuel combustion. It's also produced during deforestation and clearing for agriculture. In recent years, the concentration of CO2 in the atmosphere has risen. This means that the concentration will be more than twice the pre-industrial level by mid-century.