S

280 300 320 340 360

O 24

22 20 18 16

280 300 320 340 360 Atmospheric C02 level (ppmv)

Figure 8.9. Stomatal index change. From Woodward (1987).

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Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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