Stats

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Land

  • 40.8% of USA land is farmland - [1], or 911 million acres - [2]

Manmade

  • Worldometer
  • It costs 10 cents in feed per laying chicken per day assuming no foraging - [3]. There is an added cost of 22 weeks until laying age.
  • Max current genetics of hazel crop - 3000 lb/acre dry kernel + 5000 lb shell (fuel) - 49:48 of [4] - 10 lb/plant
  • Average USA corn crop - 8000 lb - [5]
  • Average USA soybean crop - 2700 lb - [6]
  • USA average soil erosion is 5 tons per acre for agricultural land - [7]
  • Approximately 10 million acres of cropland are lost every year due to erosion (a square more than 100 miles on the side), or 4- [8]
  • 36 billion acres of land on earth - [9]
  • total biomass yield of USA provides almost 2x the USA use of gasoline equivalent from biomass to gasoline and fuel char for gasifier engine - https://www.soils.org/files/am/ecosystems/kinght.pdf
  • total land and sea area to cover food needs per person - 1.7 acres.http://www.footprintnetwork.org/pt/index.php/GFN/page/living_planet_report_2014_facts/
  • arable land usa - .5 ha/person
  • World Military Spending - $1.7T
  • US GDP - $17T, and Government Budget- $7T
  • World GDP - or GWP - $85T
  • World energy use - 144 PWhr
  • USA Military Spending - $640B - $2k per capita spending
  • USA Trillion Military Budget - [10]
  • Annual energy use by USA - 94 exajoules
  • US energy consumption by sector - 40% electricity, 30% transportation - [12]
  • Total USA energy use - 25 PWhr - [13] - (petawatt hours (See Metric Prefixes))
  • Equivalent to 90 exajoules, consistent with Renewable Energy "Blue Bible" above.
  • 250GW of PV is installable on existing rooftops - Cosservative estimate (50% of residential rooftops) - [14]
  • Per year, let's take average insolation as 6 hours per day * 365 days - or 550 TWhr per year. That is 2% of USA's energy use, or 5% of USA's electric use. This is JUST RESIDENTIAL ROOFTOPS. Needs to add commercial rooftops, parking lots, roadway medians.
  • USA road density - 67 km/ 100 sq km of area - [15]
  • USA area - 10 million sq km
  • USA roads - 6.7 million km. Assume an average road is 2 lane with shoulder - each lane has 12 foot (3.7m) standard in the USA - [16] - or an area of about 100,000 sq km. This could power 1/4 of the world's energy needs (oil, nukes, solar)
  • Area required to power all of the world with PV is 400,000 sq km - [17]
  • Total forest area of the world - 4 billion hectares - [18] - 30% of land area of world.
  • Total farmland area worldwide -
  • Total land area - 150M sq km - google
  • Total agriculture land - 33% of world land according to FAO - [19]
  • Energy per capita US vs Switzerland - As an indicator, the average energy use per person is 12,000 watts in the USA but only 3,000 in the Switzerland - [20]
  • Percentage of USA energy by source. Coal electricity is 40% - [21]
  • Half of USA rooftops could replace all coal electricity in the USA - [22]
  • World electricity production 2009 - 20PWh - [23]
  • Area of all cities compared to world land area - 0.5% - [24] - or 750,000 sq km.

Other

  • Average driving distance - 13.5k miles/yr - USA - [25]
  • Average commute, USA - 14 miles - [26]
  • Tesla Model S battery - $12k for 10 years of service - [27]
  • This source says 5 years of service - [28]
  • Given $1200/year battery costs of Tesla Model S, cost of fuel or electricity is $1700 - no savings - between the electric and regular fuel option approximately at the 15,000 mile per year mark - according to cost calculator at [29]
  • Lithium Ion batteries - predicted to go down to under $200/kWh -[30]
  • Nickel-Iron battery energy density - 50Wh/kg - [31]
  • Lithium ion battery is 2-5x as energy dense.
  • Wikipedia says Nickel-Iron battery is 25Wh/kg -[32]
  • This source says 30-50Wh/kg - [33]
  • Lithium reserves - 13 million tons worldwide - [34]
  • One study shows there are supplies for EVs until 2100 (about a 100 year supply)
  • EVs could replace 75% of petroleum fuel - [35]
  • Materials cost for a 18650 cell (Lithium Ion) is $1.25 (about 4W) - [36]
  • Lithium is $40/lb - [37]
  • According to this source - [38] - we have 100 years of nickel reserves, nad 200 years of iron and aluminum.
  • Nickel - $6/lb
  • Iron - 20 cents/lb

Resources

  • Sustainable Energy Without the Hot Air - [39]
  • Paper on Lithium Ion vs. fuel cars - LCA - using E199 and Total Beauty frameworks. We can make a case for a much higher Total Beauty Framework using renewable fuel (charcoal) - [40]
  • Study E199 and Total Beauty
  • Embodied energy of common products - [41]