Deforestation and Its Extreme Effect on Global Warming. From logging, agricultural production and other economic activities, deforestation adds more atmospheric CO2. 4 September 2006, Rome – Most people assume that global warming is caused by burning oil and gas. But in fact between 25 and 30 percent of the greenhouse gases. Learn about Photosynthesis and load yourself with the knowledge on how plants feed themselves and produce oxygen that helps most living beings to survive. Landsat data show the effects of deforestation nearthe town of Ariquemes, Rondonia, Brazil between 1975 and 1992. Global Explain Photosynthesis. Photosynthesis allows plants to convert light into food, removes carbon dioxide from the atmosphere and releases oxygen into the atmosphere. Global Consequences of Deforestation in the Tropics. Rainforests around the world still continue to fall. Does it really make a difference? Why Is Photosynthesis Important to Humans?. Plants are all around us, benefiting us in many tangible and non-tangible ways. Photosynthesis occurs in any ecosystem. Deforestation and Greenhouse-Gas Emissions. Author: Toni Johnson Updated: December 21, 2009 This publication is now archived. As the area of deforestation increases, so the impact on climate grows. Deforestation is the permanent destruction of forests in order to make the land available for other uses. An estimated 18 million acres (7.3 million hectares) of.