ChosenEvery ore deposit is a non-renewable resource. Having said that it is the job of technology to make the price of a metal competitive, affordable. Initially when not much in demand the technology of mining it, extraction needs to pick up bringing its price down. Later demand may push up its price and the extra expenditure for adding to its supply may become unaffordable, making it appear non-renewable. A stage will come when a particular metal or more metals may have to be recycled as the quantum of it is fixed in nature. Water as consumable is no exception. So far as Sun is renewing it by sucking it from oceans, forming clouds and precipitating it in the form of rains, man need not pay his attention there. He has immense quantity of unusable water of seas ("Water, water everywhere | not a drop to drink") as an alternative!. in particular Aluminum recycling is picking up as the Electric power input, the most essential raw ingredient in its production is becoming scarce faster. Copper ore is becoming scarcer partly for same reason, against rising demand. Metals like Silicon and Calcium (even Iron) is widespread on Earth but are very difficult to extract, hence can be termed non-renewable. There are other metals not much in demand but might move in importance as alternatives to the ones that are getting priced out. Only technology separating it from reaching the market. Thorium as an alternative to Uranium is one such. However, if we go by the definition of non-renewable resources to mean Coal and Oil which are consumed without trace and cannot be replaced, none of the metals are so in that narrow sense. Economics has a habit of bending 'semantics' to suit its purpose.
Is coal a non-renewable or renewable resource?
Coal is a non-renewable resource...
... because when you use it all, it's gone, and there's no more. It takes extreme pressure and millions of years for decomposing organic matter to turn into coal. And we haven't got that long to wait for new supplies to form. So when it's burnt, it's gone for ever. No, it takes coal thousands (if not millions) of years to form from fossils of dead plant/animal material. Coal
Coal Takes Millions of Years To Create
Coal is a combustible black or brownish-black sedimentary rock composed mostly of carbon and hydrocarbons. It is the most abundant fossil fuel produced in the United States. Coal is a nonrenewable energy source because it takes millions of years to create. The energy in coal comes from the energy stored by plants that lived hundreds of millions of years ago, when the Earth was partly covered with swampy forests. For millions of years, a layer of dead plants at the bottom of the swamps was covered by layers of water and dirt, trapping the energy of the dead plants. The heat and pressure from the top layers helped the plant remains turn into what we today call coal.
Source: National Energy Education Development Project (Public Domain) Types of Coal
Coal is classified into four main types, or ranks (anthracite, bituminous, subbituminous, and lignite), depending on the amounts and types of carbon it contains and on the amount of heat energy it can produce. The rank of a deposit of coal depends on the pressure and heat acting on the plant debris as it sank deeper and deeper over millions of years. For the most part, the higher ranks of coal contain more heat-producing energy. Anthracite contains 86-97% carbon, and generally has a heating value slightly higher than bituminous coal. It accounts for less than 0.5% of the coal mined in the United States. All of the anthracite mines in the United States are located in northeastern Pennsylvania. Bituminous coal contains 45-86% carbon. Bituminous coal was formed under high heat and pressure. Bituminous coal in the United States is between 100 to 300 million years old. It is the most abundant rank of coal found in the United...