Philippine Environmental Advocacy and Education Forest • A focal ecosystem • Plays a very crucial ecological role in soil and water conservation • Acts as carbon sink that traps carbon dioxide released in the atmosphere (a hectare of vegetated forests can trap a ton of carbon dioxide every year) • Can moderate local climate • Serves as efficient watersheds, collecting and regulating the flow of water supply which can be tapped for household and industrial use, or agricultural irrigation • Prevents flash floods, control soil erosion and water pollution. • Source of wood, water, and power • Host one of the world’s richest plant and animal species CRITICAL ISSUE: Massive deforestation Major Causes: Large scale logging activities (legal and illegal) either to produce timber or to clear lands for other purposes. • Natural calamities such as forest fires, volcanic eruptions, weather disturbance Environmental Issues: • Increasing number of endangered plant and animal species • Deforestation-induced erosion, causing flash floods • Destruction of watersheds, causing siltation problems • Displacement and dislocation of the indigenous peoples and upland dwellers AGRICULTURAL LANDS Crucial life-support system Its cultivation has been developed by society to regularly meet food needs and to provide raw materials basic for the needs and development of a society. 13 million hectares (93%) of the 14.2 million hectares of alienable and disposable land are classified as agricultural lands. Primary agricultural crops: rice, corn, coconut and sugar cane. Philippine soils are classified to define the best suitable crops and land use. The basis for land classification are slope criterion, soil type drainage, climate and soil cover. CRITICAL ISSUE: Land degradation Major Causes: Erosions in grasslands and pasturelands • Destructive practices such as deforestation, rampant misuse of farm chemicals Environmental Issues: • Topsoil loss results in the loss of soil’s organic matter and moisture holding capacity, which then causes increased run-off, reduced infiltration, and poorer seedbed qualities. • Heavy reliance on farm chemicals has resulted in increased soil acidity, increased nutrient load of surrounding water bodies due to fertilizer run-off, decreased pest resistance and genetic erosion accompanied by increased crop vulnerability to pests and diseases Coastal and Marine Resources • Provide food, raw materials and ecological balance. • The Philippine archipelago has the longest discontinuous coastline in the world. • The country’s marine area (classified as coastal and oceanic waters) measures about seven times its land area. • The country’s coral reef area, the breeding ground of marine life, is identified to be the richest in the world with 488 species in corals in 78 genera. CRITICAL ISSUE: Depletion of fish resources Major causes: Overfishing, Degrading coral reefs, Mangrove conversion, Marine pollution Environmental Issues: Rampant coral reef destructions is attributed to siltation due to logging-induced erosion and mining waste, and destructive fishing practices like blast fishing, muro-ami fishing, and cyanide fishing, which all results to low fish productivity. • Mangrove conversion into fishpond areas results to loss of natural nursery grounds to numerous plant and animal species abound the area. • The quality of coastal water has deteriorated over time due to sewage and industrial effluents from urban areas, mine tailings, oil from shipping operations, and agricultural run-off. Freshwater Resources • Crucial life support system; can be used for drinking, for household use, for irrigation in agriculture, and for industrial and energy use. • Rivers, streams and lakes are pathways for the circulation of water on the planet. • Rivers draining mountains are vehicles of mineral nutrients and materials like silt, pebbles, stones, rocks and live organisms. CRITICAL ISSUE: Water shortage Major Causes: • Deterioration of water quality • Poor management and graft corruption Environmental Issues: • Water quality degradation is attributed to various pollutive practices such as direct waste dumping by domestic and industrial sources, sedimentation by logging-induced soil erosion, siltation by mining, and other ecologically disturbing agricultural practices. • Groundwater exploitation has resulted in salination or salt-water intrusion. Urbanization and Industrialization • The result of rapid economic growth which requires the development of centers of industry, trade and other economic activities. • The country’s level of urbanization as of 1990 is pegged at 48.6%. It was at 29.8% in 1960, 31.8% in 1970, and 37.5% in 1980. • The country has 1,600 urban areas, 123 of which are considered major and account for 45.5% of the country’s total population CRITICIAL ISSUE: Pollution and overcrowding Major Causes: Rural poverty and overpopulation, Industrial development Environmental Issue: • The Philippine brand of “urbanization” has been equated to increased garbage and waste generation and pollution. • Deterioration of air, water, and soil quality in premier metropolises and industrialized sectors. • Congestion due to overpopulation. • Energy problems CASE STUDY 2A: Philippine Logging Policy, A Sustainable Development? Unfair, administration still favors the loggers over the indigenous people. Banned wood exports and opt to wood imports CASE STUDY 2B: Genetically Modified Food in the Philippines The GM food aimed to make crops for it not to get infested by pests but still get infested by pests. (Ex. Bt corn) Destroys local agricultural harvest CASE STUDY 2C: Philippine Marine Water Pollution sewage and industrial effluents from urban areas, mine tailings, oil from shipping operations and agricultural run-off. Manila Bay is deteriorating Red tide in Pangasinan, a marine involving an algal bloom in sheltered bays with restricted outflows, the algal bloom can kill fish and other types of marine life. In some cases, the organisms may possess toxic substances harmless to fish but fatal to humans. CASE STUDY 2D: Killing the Waters of Life vast resources of freshwater, but is actually experiencing water shortages due to lack to resources due to lack of other social services CASE STUDY 2E: Urban Congestion population is not the cause of the deteriorating condition in the urban centers, but the illusion of urban development which fails to cope with the influx of the impoverished rural migrants. The failure rests primarily on the kind of development that is actually happening and, at the very least, on the government for turning over its responsibilities to the private sector. heavy militarization, the impact of government infrastructure projects, and other negative repercussions of private forestry, mining and plantation, resulted in the crowding of urban areas as unskilled workers troop, only to find a similar plight. ENERGY SOURCES AND USES Energy (Energeia in Greek) • In physics, simply known as activity or operation Energy Use Development • Muscle Power • Domestic Animals • Windmills/Water wheels • Steamship • Steam locomotive • Gasoline engine (Automobile) • Turbine Engine • Nuclear Power Primary Energy Source – fossil fuels, radioactive material, and solar, wind and water and other energy sources that exist as natural resources (Renewable sources) Secondary Energy Source – form of energy that must be produced from a primary energy source (Electrical Power) Energy Uses: • Transportation • Industrial Processes • Commercial and Residential Uses (heating, cooling, lighting, etc.) • Generation of Electrical Power RENEWABLE SOURCES Solar Energy Photovoltaic cells (PV cells) – simple wafer of material which puts out an electrical current when sunlight hits it Solar Trough Collector – uses sun’s energy to boil water to produce steam for driving a turbogenerator Hydropower – water under high pressure at the bottom of the reservoir behind the dam drives turbogenerators as it flows through Wind Power – uses wind-driven propeller blades and a propeller shaft which is geared directly to a generator Biomass energy of Bioconversion – use of biomass as fuel; burning materials such as wood, paper and plant wastes directly to produce energy or converting such materials into fuels such as alcohol and methane Ocean Thermal Energy Conversion (OTEC) – uses the thermal gradient of about 20C which exists between the surface water heated by the sun and colder deeper water Geothermal Energy – useful energy derived from the natural hot interior of the earth Tidal power – incoming tide flowing through the turbines generates power; as the tide shifts, the blades can be reversed Non-Renewable Energy Fossil Fuel (Natural gas) – trapped methane, previously from volcanic seeps & gassy mud pots, solid waste landfills • does not have an unlimited amount • comes from a depleting source that cannot be replenished over time • It is produced from onshore and offshore natural gas and oil wells and from coal beds. Crude Oil – residual “sludge” liquid petroleum that is found accumulated in various porous rock formations in Earth's crust and is extracted for burning as fuel or for processing into chemical products naturally occurring, yellowish-black liquid found in geological formations • Oil is a carbon-based fuel that forms when plant and animal remains are exposed to extreme conditions such as high pressure for thousands of years. The oil we use today took millennia to form. Coal – highly compressed organic matter (mostly leafy material from swamp vegetation) that decomposed relatively little • a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons • Coal is classified as a nonrenewable energy source because it takes millions of years to form Alternative Fossil Fuel Synthetic Fuels or synfuels – coal-derived fuels (uses chemical processes that converts coal to a liquid or gas fuel) • Liquids from coal, peat, natural gas, & oil shale • Ex: diesel oil, gasoline, fuel oil, methanol Oil shale – fine sedimentary rock containing a mixture of solid, waxlike hydrocarbons called kerogen (after heating, recondenses to form a black, viscous substance similar to crude oil) Tar sands – sedimentary material containing bitumen, an extremely viscous, tarlike hydrocarbon Nuclear Energy – control of nuclear reactions so that energy is released gradually as heat Two Basic Processes: (The mass of the product(s) is less than the mass of the starting material(s) and the lost mass is converted to energy) • Fission – a large atom of one element is split to produce two smaller atoms of different elements • Fusion – two small atoms combine to form a larger atom of a different element