Titanium is not classified as an "earth metal" in the traditional sense of the term. The term "earth metal" is not commonly used in modern chemistry, but when it is, it often refers to metals found in the "earths" or oxides, historically known as the alkaline earth metals which include beryllium, magnesium, calcium, strontium, barium, and radium. Titanium, however, is a transition metal, known for its high strength, low density, and resistance to corrosion. It's found in the Earth's crust and is the ninth-most abundant element in it. It's widely used in aerospace, medical devices, and many other applications due to its desirable properties. While it is a metal derived from the Earth, it does not fall within the traditional group known as "earth metals."

Most igneous rocks and their derived sediments contain titanium. which is also found in living things. rocks. oceans. and even stars. Large deposits of titanium have been found in Australia. Canada. India. Norway. South Africa. and Ukraine.

Polypropylene, a common plastic used in food packaging, textiles, and various household items, is generally considered safe under normal usage conditions. However, its production and disposal pose environmental health risks. During manufacturing, harmful gases like propylene can be emitted, contributing to air pollution and posing risks to workers' health. Over time, when exposed to sunlight and heat, polypropylene can degrade, releasing microplastics into the environment, which have been found in marine life and could enter the human food chain, posing unknown health risks. Additionally, recycling polypropylene can be challenging due to its variety in applications and additives, leading to accumulation in landfills and potential leaching of chemicals into the soil and waterways. To mitigate these risks, efforts towards reducing use, improving recycling technologies, and developing biodegradable alternatives are essential.