Removing a stain is easy these days, but this is going to involve chemicals and other unethical means. Or does it? There are many ways of removing stains that are eco friendly, check them out:

Beer: Vinegar.

Berries: Vinegar.

Blood: Soak in cold salt water or just cold water; use a hydrogen peroxide soak for stubborn stains.

Chewing Gum: Put in freezer for a few hours; once cold, peel off gum.

Chocolate: Soak in detergent and launder. If stain remains, soak in an enzyme-based stain remover

Cigarette Smoke: For yellow stains, try washing soda or sodium perborate.

Coffee and Tea: The stain in caffeine drinks is from the tannin and from milk and sugar.

Crayons and Candle Wax: Freeze the stain, remove the residue, and pull off the wax. Next, heat an iron, cover the wax stain with an absorbent cloth, and melt the wax onto the cloth.

Decals and Price Stickers: Rub with vegetable oil.

Egg: Enzymes (see Chocolate above).

Feces: Enzymes (see Chocolate above).

Fruit: Lemon juice or vinegar.

Grass: Enzymes (see Chocolate above).

Grease: Detergent; it’s best to blot the stain. Sometimes olive oil can be used to remove oil, but be careful not to create a new stain. Also, try cornstarch or citrus solvent.

Grout Stains: Hydrogen peroxide.

Ice Cream: Enzymes (see Chocolate above).

Ink: Soak in milk, vinegar, or citrus solvent.

Leather Stains: Saddle soap (which is soap and polish combined).

Lipstick and Makeup: Use a few drops of oil or glycerine, being careful not to spread the oil farther than the stain. Scrape off. Pretreat with detergent, and then wash in hot water.

Medicines, Herbs (Turmeric), Chemicals: 3 percent hydrogen peroxide.

Mildew: Vinegar.

Mold: Vinegar.

Mustard: 3 percent hydrogen per-oxide.

Oil: Glycerine.

Perfume and Essential Oils: Vinegar or baking soda.

Perspiration: Enzymes (see Chocolate above). Or soak item in salt water. Lay clothing in the sun for a few hours. Clean with shampoo (the chemistry of shampoo is designed to remove body oils).

Petroleum Oil: Washing soda.

Protein Stains: Enzymes or shampoo.

Ring around the Collar: Shampoo.

Rust: Borax paste.

Tomato Sauce: Vinegar.

Urine: Enzymes; alternating between vinegar and baking soda.

Vomit: Enzymes; alternating between vinegar and baking soda.

Wax: Freeze the stain, remove the residue, and pull off the wax. Next, heat an iron, cover the wax stain with an absorbent cloth, and melt the wax onto the cloth.

Wine: Pour boiling water from a height of 3 feet; may be more effective if you rub salt on the stain first.

Source [Gaiam]