Question

why carbon cycle is called an imperfect cycle

Answer 1

Carbon Cycle

This cycle contains any of the natural pathways by which essential elements of living matter are circulated. Biogeochemical cycles are named for the cycling of biological, geological and chemical elements through Earth and its atmosphere.
• The cycles move substances through the biosphere, lithosphere, atmosphere and hydrosphere. Cycles are gaseous and sedimentary.
• Gaseous cycles include nitrogen, oxygen, carbon, phosphorous, sulfur and water.
• These elements cycle through evaporation, absorption by plants and dispersion by wind. Sedimentary cycles include the leeching of minerals and salts from the Earth’s crust, which then settle as sediment or rock before the cycle repeats.