CO2 emissions from fossil-fuels, total (thousand metric tons) Fossil fuel is any hydrocarbon deposit that can be burned for heat or power, such as petroleum, coal, and natural gas. This is the sum total of all fossil fuel emissions (solid fuel consumption, liquid fuel consumption, gas fuel consumption, cement production and gas flaring). The U.S. Department of Energy’s carbon Dioxide Information Analysis Center (CDIAC) calculates annual anthropogenic emissions from data on fossil fuel consumption (from the United Nations Statistics Division’s World Energy Data Set) and world cement manufacturing (from the U.S. Bureau of Mine’s Cement Manufacturing Data Set). Carbon dioxide emissions, often calculated and reported as elemental carbon, were converted to actual carbon dioxide mass by multiplying them by 3.664 (the ratio of the mass of carbon to that of carbon dioxide). Although estimates of global carbon dioxide emissions are probably accurate within 10 percent (as calculated from global average file chemistry and use), country estimates may have larger error bounds. Trends estimated from a consistent time series tend to be more accurate than individual values.

CO2 emissions from fossil-fuels (% of total) Fossil fuel is any hydrocarbon deposit that can be burned for heat or power, such as petroleum, coal, and natural gas. This is the sum total of all fossil fuel emissions (solid fuel consumption, liquid fuel consumption, gas fuel consumption, cement production and gas flaring). Source organisation: Food and Agriculture Organization, electronic files and web site.

(coprolites). These types of fossil are called trace fossils or ichnofossils, as opposed to body fossils. Some fossils are biochemical and are called chemofossils A fossil (from Classical Latin fossilis, lit. 'obtained by digging') is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the fossil record. Though the fossil record Ch… Stromatolites are layered accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains by biofilms of microorganisms, especially cyanobacteria. Stromatolites provide some of the most ancient fossil records of life on Earth, dating back more than 3.5 billion years ago. Stromatolites were much more abundant in Precambrian times. While older, Archean fossil remains are presumed to be colonies of cyanobacteria, younger (that is, Proterozoic) fossils may be primordial forms of the eukaryote chlorophytes (that is, green algae). One genus of stromatolite very common in the geologic record is Collenia. The earliest stromatolite of confirmed microbial origin dates to 2.724 billion years ago. A 2009 discovery provides strong evidence of microbial stromatolites extending as far back as 3.45 billion years ago. Stromatolites are a major constituent of the fossil record for life's first 3.5 billion years, peaking about 1.25 billion years ago. They subsequently declined in abundance and diversity, which by the start of the Cambrian had fallen to 20% of their peak. The most widely supported explanation is that stromatolite builders fell victims to grazing creatures (the Cambrian substrate revolution), implying that sufficiently complex organisms were common over 1 billion years ago. The connection between grazer and stromatolite abundance is well documented in the younger Ordovician evolutionary radiation; stromatolite abundance also increased after the end-Ordovician and end-Permian extinctions decimated marine animals, falling back to earlier levels as marine animals recovered. Fluctuations in metazoan population and diversity may not have been the only factor in the reduction in stromatolite abundance. Factors such as the chemistry of the environment may have been responsible for changes. While prokaryotic cyanobacteria themselves reproduce asexually through cell division, they were instrumental in priming the environment for the evolutionary development of more complex eukaryotic organisms. Cyanobacteria (as well as extremophile Gammaproteobacteria) are thought to be largely responsible for increasing the amount of oxygen…

THE NEW FORCES Mystery of the Warming World By ran teaou ui JOHN STARK pMtol wtiun It UN ator Maybe the moat preaalng prob lem facing the world today la the threat of the hydrosenwarhead XCBM Then asaln maybe It Isnt There is an increasing band of scientists who wonder If a treater problem may bq the effect modem civilisation Is having on the worlds climate whether mans very productivity Is not setting the stage for natural disaster Their reason The earths tem perature is rising and the evi dence Is dally becoming stronger that this overwhelmingly Im portant fact Is largely due to mans practice of making fossil fuelswood coal oil gasoline do his work for him The scientists call this the Car bon Dioxide Theory of Climatic Change In essence It holds that Industrial and machine exhaust is now dumping so much CO2 Into the atmosphereaome 6000 000000 tons per yearthat the norths natural carbon dioxide balance to upset which to causing global temperatures to rise The theory to not new It had considerable currency at the turn of the century but was more of leas abondoned In later decades due to observations which seemed Incompatible Now on