Biomass

greatly affects the sustainability of harvesting the fishing stock because continuing to overfish in such a manor hinders the population’s ability to recover and may become depleted or locally extinct. This leads to a significant reduction in the biomass of a population (FAO,…

Anaerobic Digestion. A mixture of methane and carbon dioxide is called a biogas and it can be used for heating and can be used as a natural gas. Anaerobic treatment systems are divided into “high rate” systems involving biomass retention and “low rate” systems without biomass retention. High rate systems are characterized by a relatively short hydraulic retention time but long sludge retention time and can be used to treat many types of wastewater. Low rate systems are generally used to…

Discussion: The techniques used in this experiment are very useful for an efficient assessment of the quality of the habitat with regards to scavenging. This experiment is not costly with experimental apparatus and design. The high cost of achieving these consistent results is effort and time. The experimental set up required many participants to carry out the procedure however since each area was only studied for 40 min this is a relatively rapid assessment. The most dominant ant scavenger…

According to the Cloud Fraction map, I think that Africa has an arid climate in the north and south. In between is more humid as the year goes on. If you reduced cloud fraction levels to less than 25% then I would expect for there to be less vegetation and the climate to be arid in the places that seen to be humid, based off of the Cloud Fraction map. I think the precipitation levels to be low if the cloud fraction is low. To help support my claim, I looked at the maps and where there is low…

air pollution in the urban areas are from automobile exhaust. Observations of various tropospheric air pollutant such as CO, HCHO, NO2 and SO2 has revealed pollution on the global scale. CO has a significant portion from automobiles exhausts and biomass burning, air pollution by CO is very disturbing because of its effect on oxidation in the…

External & internal environment There are two types of environment of the marketing the external & internal environments. The external environment is involved of those variables which are the natural environment, societal environment and task environment. The societal environment includes general forces that do not directly touch on the short run activities of the organization but can influence its long –term these forces are the : economic forces , technological forces , political –legal…

Alternative Fuels Argumentative Essay — Hydrogen Power If one lived in a house and did nothing but throw trash everywhere, it would be no surprise that the house is a mess. In a way, people around the world do similar actions yet deny the effects of pollution, such as global warming, more intense natural disasters and climate change. The analogy referent is people using and acquiring fossil fuels continuously and polluting the atmosphere while some people deny this act and others live in…

Duckweeds, or water lens, are flowering aquatic plants which float on or just beneath the surface of still or slow-moving bodies of fresh water and wetlands. Duckweeds are good for experiments because they are very simple plants, lacking a stem. Duckweeds are commonly found in environments that are associated with fertile, even eutrophic conditions. Since duckweeds can provide nitrate removal and can absorb mineral nutrients such as nitrogen and phosphorus, they are known for purifying water.…

reaction of fuel with limited supply of oxygen to produce a hydrogen mixture (Jeremy R feburary 2003). While hydrogen fuel is made with coal it can be made by other methods such as philosopher stone and natural gas. Hydrogen can also be extracted from biomass such as woodchips and agriculture waste . The advantages and disadvantages of hydrogen fuel cell First, let us take a look at the advantages of hydrogen fuel cell. Hydrogen is easy actress because it is readily available…

Renewable Energy: A Way to Change the World In 2010 the U.S. had more than 500 coal burning power plants. Before the year was over 180 of these plants have closed and more are scheduled to close (Brown). The amount of carbon dioxide in the atmosphere is now lowering. Today many new types of alternative energy sources are taking over. Harmful fossil fuels, including coal and oil, were previously used to make all the energy possible. These are however very harmful and nonrenewable. Wind, Solar,…