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Nowadays, a variety of environmental problems affect our entire world. As globalization continues and Earth’s natural processes, few societies are being left untouched by major environmental troubles.
First of all, some of the largest problems now affecting to the world, air pollution and hazardous waste. These issues can be avoided with the recycling, for example in order to reduce pollution, we can minimize the energy spends on industrial production. Consequently, the greenhouse emission can be reduced which are harmful for the environment and our health. Furthermore, most of the landfill sides are filled up with a lot of waste products that could have been recycled, especially waste materials that belong to non-biodegradable category which takes a long time to discompose. In this way, recycling enable proper usage of these waste products and saves space for landfill.
Plant more trees. This is easy, you know? Choose an open area/ground near your residence or workplace. Plant a tree every month, encourage your friends and colleagues to join you. Have more and more trees planted and there will come a day when you have a green stretch of land thanks to your effort.
Walk more, drive less. Now that's not very difficult, is it? Choose to walk short distances instead of taking your car every time. Walking to the gym, to work (if it's not very far), go walking to run errands. Or use a bicycle. Both cycling and walking are good exercises. And each time you avoid using your car, you are contributing to reducing air pollution. You are saving fuel, saving money and getting a good workout too.
The most exciting day for anyone who wants to travel into space is the day he or she is selected to be an astronaut candidate. Then the real work begins. It can take up to two years of training to become a fully qualified astronaut. Candidates must learn the basics of the Space Shuttle and the International Space Station. They must also learn how to be part of a team by flying the NASA T-38 training jets.
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| Image above: Being selected to be an astronaut candidate is exciting. Credit: NASA |
Astronauts also take classes. They must learn many things besides science. They also learn about medical procedures. Many times, they have to give speeches, so they take public speaking classes. In order to be prepared for any emergency, astronauts take survival training.
If you are going to be a crew member on the ISS, you will also have to take language classes. You will need to be able to talk with the Russian Mission Control Center.
Space Vehicle Mock-up Facility
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Image to left: In the Space Vehicle Mockup Facility, astronauts practice what they will be doing in space. Credit: NASA
In order for astronauts to get a feel for what they will be doing in space, they practice on life-sized models. These models are called "mock-ups." The Space Vehicle Mock-up Facility (SVMF) is where they practice. In the SVMF, astronauts practice using the Space Shuttle Orbiter and parts of the ISS. In these mock-ups, astronauts will learn how they will move about.
Preparing for Microgravity
How do astronauts practice for being in space? There are many things to learn about being in the almost weightless condition known as microgravity.
KC-135
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Image to right: Astronauts feel weightless for a short time in the KC-135. Credit: NASA
This plane is also known as the Weightless Wonder or Vomit Comet. It provides about 20-25 seconds of zero gravity. For this brief amount of time, astronauts feel weightless. Sometimes, even experienced astronauts get sick in the KC-135. That is where it gets one of its names.
The Precision Air-Bearing Floor
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Image to left: Astronauts learn how to move large objects in space using The Precision Air-Bearing Floor. Credit: NASA
One part of an astronaut's work may include moving large objects in space. This can be easy because there is no friction to push against. But, this also makes the job hard. There is no friction to make the large objects stop! They could float and float and float.
The Precision Air-Bearing Floor allows astronauts to move huge objects as they might in space. It is a large, smooth metal floor. The large objects have air forced through them. It is like a large air hockey table.
The Neutral Buoyancy Laboratory
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Image to right: Astronauts use the Neutral Buoyancy Laboratory to practice extravehicular activities. Credit: NASA
To practice extravehicular activities, or space walks, astronauts go underwater. The astronauts use the Neutral Buoyancy Laboratory (NBL), a huge "swimming pool." The NBL pool is 62 meters (202 feet) in length, 31 meters (102 feet) in width and 12 meters (40 feet) in depth. The pool holds 22.7 million liters (6.2 million gallons) of water.
Astronauts float in the water while they practice on full-sized models of space vehicles. They may spend up to seven hours at a time under water.
Although astronaut candidates may have their college degrees, school is just beginning for them when they are selected. There is still much to learn.
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Hello everyone, today I'd like to tell you some information about types and sources of energy. Energy is classified into two main groups: renewable and non-renewable.The energy generated from natural sources such as the sun, wind, rain, and tides is called renewable energy. They are plentiful and can be generated again and again. They also have low carbon emissions so they are considered green and environment-friendly. Moreover, using renewable energy can reduce your electricity bills. Unfortunately, solar energy can be only used during the daytime but not during night or the rainy season. Geothermal energy also can bring toxic chemicals beneath the earth's surface to the top and can create environmental changes.
Non-renewable energy is the energy taken from other sources that are available on earth.They are limited and will run out in the future. They can't be re-generated in a short time.Fossil fuels - natural gas, oil and coal - are examples of them. They are cheap and easy to use. However, when burnt, they release toxic gases in the air so they cause serious environmental changes such as global warming. And the important thing is that non-renewable sources will expire someday. 2. 1. Use public mode of transportation
Encourage people to use more and more public modes of transportation to reduce pollution. Also, try to make use of carpooling. If you and your colleagues come from the same locality and have same timings you can explore this option to save energy and money.
2. Conserve energySwitch off fans and lights when you are going out. A large number of fossil fuels are burnt to produce electricity. You can save the environment from degradation by reducing the number of fossil fuels to be burned.
3. Understand the concept of Reduce, Reuse and RecycleDo not throw away items that are of no use to you. In-fact reuse them for some other purpose. For e.g. you can use old jars to store cereals or pulses.
4. Emphasis on clean energy resourcesClean energy technologies like solar, wind and geothermal are on high these days. Governments of various countries have been providing grants to consumers who are interested in installing solar panels for their home. This will go a long way to curb air pollution.
5. Use energy efficient devicesCFL lights consume less electricity as against their counterparts. They live longer, consume less electricity, lower electricity bills and also help you to reduce pollution by consuming less energy.
Several attempts are being made worldwide on a personal, industrial and governmental levels to curb the intensity at which air pollution is rising and regain a balance as far as the proportions of the foundation gases are concerned. This is a direct attempt at slacking Global warming. We are seeing a series of innovations and experiments aimed at alternate and unconventional options to reduce pollutants. Air pollution is one of the larger mirrors of man’s follies, and a challenge we need to overcome to see a tomorrow.
3.TYPE OF NATURAL DISATER: Flood
WAYS TO PREPARE:
• – Check for local flood warnings if your area is at risk: look online or call Floodline.
• – Tune in to the local radio or television news for updates. Alert your neighbours, particularly elderly or vulnerable people.
• – Prepare an emergency kit, including emergency numbers, insurance policy, first aid kit, torch and water.
• – Use our home emergency contacts sheet so you have the numbers you need to hand, even if you lose power.
• – Have a list of irreplaceable items to keep safe and put important personal documents into a sealed bag.
• – Pack essential items you will need if evacuated – medication, clothing, toiletries and items for children.
• – Purchase unfilled sandbags and sand from builders’ merchants. Remember that, if there is a flood, demand may exceed supply – as people will rush to buy them.
• – Empty freezers and refrigerators, leaving doors open.
• – If you can, move any vehicles to higher levels.
• – If you have time, take photographs before you leave. This may help later with insurance claims.
• – Turn off the mains power and water, and take mobile phones and chargers with you. Put sandbags in toilet bowls to prevent sewage back-flow.
• – Shut windows, lock doors – and don’t forget to take your pets.
