Annual rings in wood are evidence that in climates with a single annual growing season, the divides actively when water is plentiful and temperatures are suitable for growth, and ceases to divide when water is scarce and the weather is cold.

Vascular cambium

Explanation:

Vascular cambium usually refers to the narrow layer present in the plant body that distinguishes the xylem from the phloem and that is responsible for the division and multiplication of cells and helps in the secondary growth of plants such as the diameter of the stem.

This vascular cambium plays a significant role in determining the past weather and climatic pattern and formation of woods. This wood formation is a dynamic process and it comprises the annual tree rings that are formed because of the activities of the vascular cambium throughout a year.

These cells can tell when there were plenty and scarcity of water and when the weather was warm and cold.

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]