To remove scratches from plastic garden furniture, you can start by cleaning the surface with a mild soap and water to remove any dirt or debris. Then, you can try using a plastic polish or a paste made of baking soda and water to gently buff out the scratches. Another option is to use a heat gun or hairdryer to heat the scratched area and then gently rub it with a cloth to smooth out the scratches. If the scratches are deep, you may need to consider using a plastic repair kit or seeking professional help to fix the damage. **

The black spots on white plastic garden furniture are likely mold or mildew. These spots can develop when the furniture is exposed to moisture and humidity, creating the perfect conditions for mold and mildew to grow. To remove the black spots, you can use a mixture of water and white vinegar, or a commercial mold and mildew cleaner. Regular cleaning and proper storage of the furniture when not in use can help prevent the growth of mold and mildew. **

Stationary points are points on a graph where the derivative of the function is equal to zero. At these points, the function's rate of change is neither increasing nor decreasing, so the graph appears to be "stationary" or flat. Stationary points can be either maximum points, minimum points, or points of inflection, and they are important in calculus for determining the behavior of a function and finding its critical points. **

Stationary helicopters, also known as hovering helicopters, are helicopters that are able to remain in a fixed position in the air without moving forward, backward, or sideways. This is achieved by using the helicopter's rotor blades to generate lift and counteract the force of gravity. Stationary helicopters are often used for tasks such as search and rescue, aerial photography, and surveillance, where the ability to hover in one place is essential. **

To get a plastic garden chair shiny and clean again, start by mixing a solution of warm water and mild dish soap. Use a soft-bristled brush or sponge to scrub the chair, paying extra attention to any stains or dirt buildup. Rinse the chair thoroughly with clean water and allow it to air dry. For added shine, you can also use a plastic cleaner or polish specifically designed for outdoor furniture. **

To remove oil stains from plastic garden furniture, you can start by blotting the stain with a paper towel to absorb as much oil as possible. Then, mix a solution of dish soap and warm water and scrub the stain with a sponge or brush. For granite, you can create a paste using baking soda and water and apply it to the stain. Let it sit for a few hours, then scrub the area with a soft brush and rinse with water. For stubborn stains, you can also use a commercial granite cleaner or a mixture of acetone and baking soda. **

Yes, burning plastic is harmful to health as it releases toxic fumes and chemicals into the air. These fumes contain harmful substances such as dioxins, furans, and other pollutants that can cause respiratory issues, skin irritation, and other health problems when inhaled. It is important to avoid burning plastic and instead dispose of it properly through recycling or other waste management methods to protect both human health and the environment. **

PVC plastic can be harmful to health because it contains toxic chemicals such as phthalates and vinyl chloride. These chemicals can leach out of the plastic and into the environment, posing a risk to human health. Phthalates have been linked to hormone disruption and other health issues, while vinyl chloride is a known carcinogen. Therefore, it is important to limit exposure to PVC plastic and seek out alternative, safer materials whenever possible. **