Greening the Environment

Solar Energy is the Future

We consume fossil fuels at a greater rate than we have ever had over the past 50 years. That demand is fueled by the increase of cars on the street, the number of planes that take to the air and the number of homes that need electricity. Sadly, we will have depleted these resources by the end of this century which is why we have to come up with other ways to get power and solar energy may be the future.

Solar energy is simply extracting the sun’s energy for power. Just to tell you how powerful the sun is, it can burn scrub lands and give you sunburn if you are out in the sun without any protection. In fact, the Greeks and the Chinese used this to set fire until the 1880’s by Charles Fritts made the first solar cell.

Instead of using a heater to warm up the home, sunlight can be used to control the temperature. You will just need large windows and shades to control the amount of sunlight that will go inside and keep the heat absorbed during the day to remain at night.

Solar energy can also provide warm water as it warms up cold water that passes down through the closed flat panels called collectors.

But solar energy does not only give warmth to the home. It can also be used to help power it which reduces our dependence on non-renewable resources like oil or coal.

This occurs when solar cells are installed on the roof so it will be able to capture as much solar rays as possible and then converts this into electricity.  You will need 10 or 12 to capture at least a kilowatt of power and more if you are powering more than just your home.

The only limitation which challenges the use of solar energy is that it can only generate power during the day. The answer to this is to put an auxiliary system in place that will store the energy and kick when the sun is not available. This comes in the form of batteries which will provide power in the evening or a brownout.

Advances in technology have taken solar energy to the next level. NASA uses it to power satellites in orbit, solar panels installed onboard aircraft allow it to fly across oceans while cars can travel speeds up to 40 miles per hour.  It is used to power a lighthouse so seafarers will be able to find their way at sea while aircraft can land in an airport in the middle of the frozen desert.

Solar energy is safe for the environment since it does not emit any harmful gases or chemicals into the air. It is a renewable resource that has not yet been fully tapped by a lot of countries which makes it very viable for the future.

But is it the only answer to reduce our dependence on oil? No because solar energy is just one of the options. We can also harness the power of the wind, the wave in the oceans, geothermal heat, hydroelectricity and a lot more instead of relying on coal or even nuclear energy that may harm the environment.

It is something we have to push for the next generation.

Solar Energy - How Does It Benefit the Agricultural Sector?

What is solar energy? To put it simply, this is the energy coming from the sun. The heat and light that the sun provides are essential to life. Can you even imagine life without the sun? It will not be normal and there are lots of things and experiences that people can no longer indulge into if ever that will be the case.

Everybody relies on the sun for its benefits. Did you know that the earth gets 174 petawatts of insulation or the incoming radiation from the sun? This happens at the upper part of the atmosphere. Almost 30% gets reflected back to the space. The rest of the percentage is being absorbed by the clouds, land masses and oceans.

The Agricultural Sector
If you can think of one industry that won’t survive without the energy coming from the sun, what will be the first thing on your mind? There may be many sectors that must rely on the sun’s benefits. But the agricultural and horticulture industry will not thrive without it. They have no other options. If the sun will be gone, these sectors will die.

The sun is need by the agricultural and horticulture departments to be able to grow their produce. The latter is needed by people as well as animals. These sectors’ productivity will depend on the amount of energy that they are getting from the sun. It must be balanced in all ways. It can never too little. And it must also not be so much.

If it is too little, the plans may not be able to grow accordingly. The farmers won’t achieve the required harvests in order to feed the population. And if it is too much, this will damage the crops. This will also cause bad effects on people’s health. But if the latter is the case, people can think of ways in order to achieve the needed produce by manually trying to reduce the amount of heat that can be directed on the plants. But if the situation becomes unbearable, it might lead to drought and deaths.

Farmers must know when the sun will be up, when sunny days will be long and factors like that so that they can settle for what kinds of plants they must plant to survive the kind of weather condition. Here are only some of the things that they resort to in order to optimize the full benefits of the energy coming from the sun.

• Timed planting cycles
• Different heights of plants in between rows
• Tailored row orientation
• Mixing different varieties of crops to improve the yields

Do you ever wonder what farmers did in times like the Little Ice Age? It is said that English and French farmers resorted to fruit walls. These fruit walls help in maximizing the collection of the energy from the sun. These serve as the thermal masses. These walls help in keeping the plants warm to speed up the process of growing and ripening of produce.

The sun’s energy is also being utilized in these sectors in vital activities such as drying the crops, pumping of water, drying animals’ manure, brooding of chicks and a lot more.

It is hard to imagine the agriculture and horticulture sectors to survive without the solar energy. If there are anybody who knows the importance of the sun, these people are the first in line.

Warming Up

Warming Up: Alternative Energy Source and Global Warming

Global warming is one of the “hottest” issues nowadays. The current climate change is the worst yet to happen. Global warming is an overall increase in world temperature which is attributed to the increasing number of greenhouse gases trapped in the atmosphere. Searching an alternative energy source is considered a way of reducing the toxic emissions.

Greenhouse gases can be produced both by natural and industrial processes. The most abundant greenhouse gases on earth’s atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, ozone and CFCs.

There are several sources of greenhouse gases. Burning of fossil fuels and deforestation lead to higher concentration of carbon dioxide in our atmosphere. Without the trees and plants to take in the carbon dioxide emitted by burning fossil fuels, natural gas and petroleum products, all of the CO2 emitted stays in the atmosphere.

Also the use of CFCs or chlorofluorocarbons in refrigeration systems and in fire suppression systems and other manufacturing processes also increase the greenhouse content of our atmosphere. While the use of non-organic fertilizers in agriculture also lead to higher nitrous oxide concentrations, another greenhouse gas.

In the United States, greenhouse gas emissions mainly come from the use of fossil fuels as energy source. Approximately 82 percent of the greenhouse gas emission in the United States in 2006 came from the combustion of coal, natural gas and petroleum (United States Energy Information Administration). Meanwhile in Asia, Chine is expected to increase its emission of greenhouse gas because of the construction of old-fashioned power plants in its internal provinces. Currently, the carbon dioxide concentrations in the atmosphere are the highest in 150,000 years. The 1990s was most likely the warmest decade in history, while 1998 was the warmest year (Greenpeace).

Not controlling the greenhouse gas being emitted by human activity can increase climate change the next hundred years that will be much faster than anything known and recorded in history. There are necessary steps to be undertaken to control the toxic emission that will soon be killing us.

To minimize the consumption of oil, petroleum and other fossil fuel, we should use energy efficiently. Energy that we use should be generated from renewable energy source, which would mean harnessing the natural energy from the sun, winds, crops, tides and waves.

Green energy is another term used to describe sources of energy that are considered to be environmentally friendly, which is also similar to the renewable sources of energy.

There are numerous ways of generating electricity and energy from renewable and natural sources that generate clean and safe energy. Wind, sun, and heat can generate electricity for less price and less carbon emission than those of coal and even gas.

Shifting the world’s attention to alternative fuel source other than relying on fossil fuel is among the solutions in resolving the drastic climate change. Greenpeace cited that with renewable energy and using it smartly, can deliver half of the world’s energy needs by 2050. Greenpeace also cited that it is feasible to reduce carbon dioxide emission to almost 50 percent within the next 43 years.

Governments are taking steps to use and tap alternative energy sources as main source of energy. The European Union leaders made an agreement in March 2007 to ensure that 20 percent of their nation’s energy should come from renewable fuels by 2020. This is part of their effort to cut carbon dioxide emissions and other greenhouse gas. There are even governments offering incentives to their residents who are using green energy.

Alternative energy source may not be the only way to reduce the greenhouse emission that human activity produce. There are simple ways in which we can do to contribute in reducing toxic gas emission and mitigate global warming.

Alternative Energy Sources for Cars

Running Unconventionally: Alternative Energy Sources for Cars

It can be about the money. People are looking for alternative energy sources or alternative fuel for their cars nowadays. A few months ago, increasing prices of petroleum products were experienced almost throughout the world. With the increasing money spent on the pump, we are trying to look for alternative fuels for vehicles that can eventually lead us to bigger savings.

Cars or vehicles running on alternative fuel are generally running on fuel other than gasoline or diesel. Over the years, we have become witnesses on car running on electricity, a hybrid of gasoline and electric car, or even solar powered. There are even cars using water to supplement their gas through the water-to-gas technology.

There are several factors contributing to the rise and initiative of governments and manufacturers to produce alternative fuel vehicles. Heavy taxes on fuel, particularly in Europe and tightening environmental laws are several of the contributing factors. There is a possibility of further restrictions on greenhouse gas emissions.

Since cars are mostly running on fossil fuels which produce carbon dioxide which is a greenhouse gas, the number of greenhouse gases in the atmosphere is increasing. It leads to temperature rise which results to global warming and climate change.

There are cars that are capable in running on LPG, solar power, ethanol, fuel cells, hydrogen, and compressed cars. There are also what we call hybrid cars. Cars running on liquefied petroleum gas or LPG runs on a mix of propane and butane. Its hydrocarbon gases turn to liquid when compressed. Cars running on LPG can cut the fuel expense into half compared to petrol and diesel. It is also said to reduce the carbon monoxide emission.

Cars using solar power convert sunlight into electricity. It can be used to power electric motors or produce fuels such as hydrogen. Solar panels are put on the surface, more often on the roof, of the vehicle. These solar panels then convert the sun’s energy into electrical energy.

Ethanol is an alcohol produced by the fermentation of plant juice with high levels of sugar or from crops with high levels of carbohydrates such as wheat. Brazil began converting sugar cane into ethanol in 1975. Since then, Brazil has saved $1.8 billion by replacing their 200,000 barrels of oil daily consumption.

Brazil has already created 5.4 million ethanol- powered cars that are being exported to Sweden and Japan. Because of this industry they were able to provide 900,000 jobs to their people. Using ethanol as fuel were also able to reduce the toxic emissions by 30 % compared with other fuel charged vehicles.

Fuel cell cars covert hydrogen and oxygen into electricity and heat. The electricity can be used to power and electric motor and the only emissions are heat and water. Cars running on hydrogen are considered to be the ultimate clean cars. Since hydrogen vehicles only produce heat and water vapour as its by-product, its emissions are considered environmental friendly.

Hybrid cars use two different energy source or motors. An example of a hybrid car is the Toyota Prius. It uses advanced technology to combine a small gas engine with an electric motor. At slow speed, the car runs on electric motor while on the freeway, both the gasoline and electric motor is being used. The battery is also being recharged during the process.

Exploring alternative energy sources for cars is a way of adapting to the increasing fuel costs and taking active steps in resolving environmental concerns.