save our tiger !!!

save earth

Can anything you do really matter to the Earth? On a universal scale,
no. The Earth will keep on spinning, evolving and sustaining life no
matter what humans choose to do. There's much to do, however, to
reduce the pressure on our Big Blue Marble's limited resources.

Read more: How to Save the Earth | eHow.com http://www.ehow.com/how_136632_save-earth.html#ixzz0sJHiGRlo
1.
Step 1

Consume less. Everything people do, including eating (especially meat), watering lawns, heating homes and driving cars, consumes resources. Everything people buy requires resources to produce and ship. Be conscious of all the small decisions you make in your everyday life that increase the total human impact on the planet. See related eHow articles How to Live With Less, How to Live Off the Land and How to End World Hunger.
2.
Step 2

Choose to have fewer (or no) children. The pressure on Earth's resources by its ever-increasing human population is one of the most dire issues that the planet faces.
3.
Step 3

Learn what types of fish are in danger of being overfished and don't buy them at the store or order them in restaurants. The United Nations site offers background information (see Additional Resources). For specific recommendations on which fish are caught and farmed in ways that support a healthy environment, check out Seafood Watch at the Monterey Bay Aquarium's site (in Resources).
4.
Step 4

Consider driving a smaller or hybrid car. Of course, buying a new car equals more consumption, so approach this issue with some caution. But if you're already looking for a new car, get one that's energy efficient.
5.
Step 5

Support international agreements to limit the output of greenhouse gases. Reduce your own energy use as much as possible. See the eHow titled How to Prepare for Skyrocketing Energy Costs.
6.
Step 6

Downsize your life. See Related eHows How to Get Organized and How to Get Rid of What You Don't Want.
7.
Step 7

Buy organic food. Pesticides take a toll on the environment and frequently spawn pesticide-resistant pests. Buying organic food directly from the growers supports small farms and promotes biodiversity. See the eHow on How to Prepare an Organic Vegetable Garden.
8.
Step 8

Lend your energy to protecting the drinking water supply on both micro and macro levels. Access to and availability of clean drinking water is a growing global crisis. Cut back on personal water use with water-wise gardens (How to Design a Dry Garden) and promote development of sound water policies in your town or region (How to Manage Growth in Your Community). Or join forces with scientists working to perfect the difficult and expensive process of desalinization (waterdesalination.com).


Read more: How to Save the Earth | eHow.com http://www.ehow.com/how_136632_save-earth.html#ixzz0sJHvH53H

Water pollution

When toxic substances enter lakes, streams, rivers, oceans, and other water bodies, they get dissolved or lie suspended in water or get deposited on the bed. This results in the pollution of water whereby the quality of the water deteriorates, affecting aquatic ecosystems. Pollutants can also seep down and affect the groundwater deposits.

Water pollution has many sources. The most polluting of them are the city sewage and industrial waste discharged into the rivers. The facilities to treat waste water are not adequate in any city in India. Presently, only about 10% of the waste water generated is treated; the rest is discharged as it is into our water bodies. Due to this, pollutants enter groundwater, rivers, and other water bodies. Such water, which ultimately ends up in our households, is often highly contaminated and carries disease-causing microbes. Agricultural run-off, or the water from the fields that drains into rivers, is another major water pollutant as it contains fertilizers and pesticides.

Domestic sewage refers to waste water that is discarded from households. Also referred to as sanitary sewage, such water contains a wide variety of dissolved and suspended impurities.
Biochemical oxygen demand, or BOD

The amount of organic material that can rot in the sewage is measured by the biochemical oxygen demand. BOD is the amount of oxygen required by micro-organisms to decompose the organic substances in sewage. Therefore, the more organic material there is in the sewage, the higher the BOD. It is among the most important parameters for the design and operation of sewage treatment plants. BOD levels of industrial sewage may be many times that of domestic sewage. Dissolved oxygen is an important factor that determines the quality of water in lakes and rivers. The higher the concentration of dissolved oxygen, the better the water quality. When sewage enters a lake or stream, micro-organisms begin to decompose the organic materials. Oxygen is consumed as micro-organisms use it in their metabolism. This can quickly deplete the available oxygen in the water. When the dissolved oxygen levels drop too low, many aquatic species perish. In fact, if the oxygen level drops to zero, the water will become septic. When organic compounds decompose without oxygen, it gives rise to the undesirable odours usually associated with septic or putrid conditions.

It amounts to a very small fraction of the sewage by weight. But it is large by volume and contains impurities such as organic materials and plant nutrients that tend to rot. The main organic materials are food and vegetable waste, plant nutrient come from chemical soaps, washing powders, etc. Domestic sewage is also very likely to contain disease-causing microbes. Thus, disposal of domestic waste water is a significant technical problem. Sewage generated from the urban areas in India has multiplied manifold since 1947.

Today, many people dump their garbage into streams, lakes, rivers, and seas, thus making water bodies the final resting place of cans, bottles, plastics, and other household products. The various substances that we use for keeping our houses clean add to water pollution as they contain harmful chemicals. In the past, people mostly used soaps made from animal and vegetable fat for all types of washing. But most of today’s cleaning products are synthetic detergents and come from the petrochemical industry. Most detergents and washing powders contain phosphates, which are used to soften the water among other things. These and other chemicals contained in washing powders affect the health of all forms of life in the water.

Agricultural Run off

Eutrophication

When fresh water is artificially supplemented with nutrients, it results in an abnormal increase in the growth of water plants. This is known as eutrophication. The discharge of waste from industries, agriculture, and urban communities into water bodies generally stretches the biological capacities of aquatic systems. Chemical run-off from fields also adds nutrients to water. Excess nutrients cause the water body to become choked with organic substances and organisms. When organic matter exceeds the capacity of the micro-organisms in water that break down and recycle the organic matter, it encourages rapid growth, or blooms, of algae. When they die, the remains of the algae add to the organic wastes already in the water; eventually, the water becomes deficient in oxygen. Anaerobic organisms (those that do not require oxygen to live) then attack the organic wastes, releasing gases such as methane and hydrogen sulphide, which are harmful to the oxygen-requiring (aerobic) forms of life. The result is a foul-smelling, waste-filled body of water. This has already occurred in such places as Lake Erie and the Baltic Sea, and is a growing problem in freshwater lakes all over India. Eutrophication can produce problems such as bad tastes and odours as well as green scum algae. Also the growth of rooted plants increases, which decreases the amount of oxygen in the deepest waters of the lake. It also leads to the death of all forms of life in the water bodies.

The use of land for agriculture and the practices followed in cultivation greatly affect the quality of groundwater. Intensive cultivation of crops causes chemicals from fertilizers (e.g. nitrate) and pesticides to seep into the groundwater, a process commonly known as leaching. Routine applications of fertilizers and pesticides for agriculture and indiscriminate disposal of industrial and domestic wastes are increasingly being recognized as significant sources of water pollution.

The high nitrate content in groundwater is mainly from irrigation run-off from agricultural fields where chemical fertilizers have been used indiscriminately.


Industrial effluents

Waste water from manufacturing or chemical processes in industries contributes to water pollution. Industrial waste water usually contains specific and readily identifiable chemical compounds. During the last fifty years, the number of industries in India has grown rapidly. But water pollution is concentrated within a few subsectors, mainly in the form of toxic wastes and organic pollutants. Out of this a large portion can be traced to the processing of industrial chemicals and to the food products industry. In fact, a number of large- and medium-sized industries in the region covered by the Ganga Action Plan do not have adequate effluent treatment facilities. Most of these defaulting industries are sugar mills, distilleries, leather processing industries, and thermal power stations. Most major industries have treatment facilities for industrial effluents. But this is not the case with small-scale industries, which cannot afford enormous investments in pollution control equipment as their profit margin is very slender.

Effects of water pollution

The effects of water pollution are not only devastating to people but also to animals, fish, and birds. Polluted water is unsuitable for drinking, recreation, agriculture, and industry. It diminishes the aesthetic quality of lakes and rivers. More seriously, contaminated water destroys aquatic life and reduces its reproductive ability. Eventually, it is a hazard to human health. Nobody can escape the effects of water pollution.

an adult body is made up of...

The human body is made up of a head, neck, torso, two arms and two legs. The average height of an adult human is about 5 to 6 feet tall. The human body is made to stand erect, walk on two feet, use the arms to carry and lift, and has opposoble thumbs (able to grasp).



The adult body is made up of:

* 100 trillion cells
* 206 bones
* 600 muscles
* 22 internal organs

Why do humans sweat?

Sweat is your body's natural way of cooling down. When you get really hot from the bright sun or from running around outside, the tiny pores on your body open up to let heat out – and this is when you sweat! And, as the sweat comes out of your body, you cool off!

Why is water good for you?

Glass of water

People, animals and plants all need clean water to live. Infact more plants and animals live in water than on land. Blood is mostly water, and your muscles, lungs, and brain all contain a lot of water. Your body needs water to regulate body temperature and to provide the means for nutrients to travel to all your organs. Water also transports oxygen to your cells, removes waste, and protects your joints and organs.

top 10 recycleing tips

Top Recycling Tips

1. First things first, a little R & R & R
The aphorism is so tired it almost might seem like “reduce, reuse, recycle” should go without saying. But in fact, most of us have only really heard the last third of the phrase, and they’re ranked in order of importance. Reducing the amount that we consume, and shifting our consumption to well-designed products and services, is the first step. Finding constructive uses for “waste” materials is next. And tossing it in the blue bin is last. (The garbage can is not on the list, for good reason.) Through a balance of these three principals you can easily see your landfill-destined waste dwindle fast. A good example of recycling is setting your empty water bottles in the bin on the curb. But by using a water filter and reusable container you can reduce or completely eliminate your need for disposable plastic bottles.

2. Know what you can and can't recycle
Read up on the recycling rules for your area and make sure you don't send anything in that can't be processed. Each city has its own specifics, so try to follow those guidelines as best you can.

3. Buy recycled
The essence of recycling is the cyclical movement of materials through the system, eliminating waste and the need to extract more virgin materials. Supporting recycling means feeding this loop by not only recycling, but also supporting recycled products. We can now find high recycled content in everything from printer paper to office chairs.

4. Encourage an artist
If you know someone interested in making art from recycled materials, offer to provide supplies. Many school children need items like paper towel tubes for art projects. Older artists use everything from rubber bands to oven doors. If you know someone who teaches art classes, suggest that an emphasis be put on making art from trash. While you're at it, remind them to use recycled paper and biodegradable, earth-friendly glues, paints, and pencils whenever possible. See below for inspiration and groups that connect artists and students with useful “trash.”

5. Recycle your water
If you're a homeowner, consider rearranging your plumbing so that rainwater or wastewater from your shower and tub is used to flush your toilet. If you have a garden, water it with leftover bathwater or dishwashing water (as long as you use a biodegradable soap). For more on water recycling see How to Go Green: Water.

6. Recycle your greenery
William McDonough and Michael Braungart, authors of the groundbreaking Cradle to Cradle, envision so-called “waste” divided into two categories: technical nutrients and biological nutrients. Biological nutrients are those that, at the end of their useful life, can safely and readily decompose and return to the soil. Composting is one of the simplest and most effective recycling methods. Both your garden cuttings and your green kitchen waste can go into an outdoor or indoor composter (with or without entertaining a population of worms). If you don't have a garden yourself, find neighbors or a community garden that can make use of your soil. Composting food scraps will mean your regular kitchen wastebasket fills up more slowly and also won’t smell. Hotter, more active compost heaps can also consume tougher stuff like newspaper and paper napkins. After Christmas, many cities also have programs for turning your tree into mulch.

7. Recycle your robots
Electronics recycling is becoming more common in many urban areas, battery recycling is ubiquitous (rechargeable batteries are ecologically sounder, but even they wear out after a while), and there are a number of non-profit organizations that will take computer parts and turn them into working computers for others. Companies like Ebay have also developed programs to help your electronics find new homes. Other groups will gladly recycle your cell phone or give it to a senior citizen, as even without a contract it can still make emergency calls. If you have a major appliance that doesn't work and you'd rather replace it than try to fix it, offer it to local repair shops, trade schools, or hobbyists to tinker with. Many cities now offer hazardous waste recycling days when they will take not only hazardous waste, but electronics.

8. Anticipate recycling
In addition to buying recycled goods, keep a keen eye out for recyclable goods. Whenever you purchase something packaged, think about how you can reuse the packaging, return it to a shipping store for reuse, or try to otherwise recycle it. If you get something likely to run down or wear out over time, such as an electronic component, give preference to the model that can be easily upgraded or cannibalized for parts so that you don't have to junk the whole thing if one part breaks. Products that are impossibly fused together are often called “monstrous hybrids” and are, while often cheaper up front, frequently unfixable and unrecyclable.

9. If you don’t love something, let it go
Lots of charities welcome your donations. Groups like Freecycle and Recycler's Exchange exist to help you get rid of useful objects that you just don't want to make use of. If you're in a Craigslist city, make use of the "free stuff" section. Give away clothes that don't fit, the boxes you used in your last house move, or scented soaps that don't appeal to your sensibilities. Make it a rule in your house that nothing useable goes in the trash until you've given the community a fair shot at it.

10. Become a waste-stream analyst
To better understand the kind of materials that enter and leave your home, office, or school, consider conducting a waste audit. Set a span of time like a week or a month, and separate your waste categories. Weigh the different kinds of material flows that go out the door (landfill waste, organic compost, aluminum, recyclable plastic, reusable material, etc.). Design a “material recovery” program that minimizes the amount going to the landfill. This is a great exercise to do with kids but can be very convincing to corporate higher-ups, too, especially since most companies pay to have their trash hauled away and can get money for recycled paper, containers, toner cartridges, corrugated cardboard, and such.