Vegetation 3) By what percent of its natural value has the gross photosynthesis

Question

Vegetation

3) By what percent of its natural value has the gross photosynthesis increased? Round to the nearest whole percent.

Volcanoes Atmosphere 589 + 240 ±10 (average atmospheric increase:4 PgClyr) Net land flux 1 Net ocean flux 1.7 2.3 ±0.7 IU Rock weathering 0.1 Export from soils to rivers 1.7 Surface ocean 50 Marine 37 3 Rivers 0.9 Burial 901 1101 0.2 11 Intermediate & deep sea 37,100 Dissolved organic carbon 700 350-550 -30 ±45 soils 1500-2400 +155±30 Fossil fuel reserves Gas: 383-1135 Oil: 173-264 Permafrost 1700 Ocean floor surface sediments 1,750 Coal:446-541 365 ±30 Units Fluxes: PgClyr Stocks: PgC

Explanation / Answer

1) Just as per cent means out of a hundred, so parts per million or ppm means out of a million. Usually describes the concentration of something in water or soil. Oneppm is equivalent to 1 milligram of something per liter of water (mg/l) or 1 milligram of something per kilogram soil (mg/kg).

2) Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities

3) Intermediate and Deep Sea

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