argumentsagainst

=Evidence AGAINST global warming= Kelsey and Ayanna

//Over the past 100 years the earth’s temperature has risen, however it is **out of our control**, **this is not a man made problem but an issue that nature has caused.** Though humans are doing things that could be threat to our environment, it is **insignificant to amount of damage nature is causing**.//

__Glaciations Cycles__ [|view the article]
 * Over the last 700,000 years the climate has operated relatively predictable schedule of 100,000 year glaciations cycles
 * Glaciations cycle: typically 90,000 years of cooling → ice age → warming period
 * Warming period: interglacial. This lasts 10,000 – 12,000 years
 * The last ice age reached its coolest point 18,000 to 20,000 years ago (the average temperature was 9 – 12.6 degrees F more than the present)
 * Earth is currently in interglacial called the Holocene that began 10,700 years ago
 * During the Holocene there have been about seven major warming and cooling trends
 * Some trends last 3,000 years and some are as short as 650 years
 * Holocene maximum: the warmest the earth has been during the Holocene

__Prior Incidents of Global Warming__
 * Global warming was **present before the 20th and 21st centuries**
 * //Yes there was global warming when they didn’t have SUV !//**
 * In the early part of the second millennium the **temperature was higher than today** (world wide)

__Climate Changes__
 * Earth temperature has changed dramatically
 * Its changed relatively greats in the last 1,000 years
 * //Proof?//
 * 1) Growth of tree rings → show extremely cold, or moderately cold periods
 * 2) Glaciers advance and retreat → this mountain glaciers and polar glaciers
 * 3) Coal growth rings tell us the temperature of the ocean

__Sun__ [|view the page]
 * The suns output changes
 * 1) the amount of heat the sun gives off changes
 * the sun has strong magnetism and is pulling us closer

THE BENEFITS OF GLOBAL WARMING:


 * Economic**
 * Heating costs will decline
 * Agriculture will be better because crops will grow faster and studier
 * 1) Increased CO2 has helped increase crop yields to feed more people


 * Social**
 * Warmer winters with no affects on summers
 * Less snow and ice would reduce transportation delays


 * Health**
 * Fewer people will die from cold related complications (more people die in the cold than in the hot)
 * 1) A warmer world is beter for human health on average
 * Boost agricultural productivity which reduces hunger and illnesses that malnutrition produce


 * Environmental**
 * The earths climate is more stable during warming periods
 * A warming will reduce sea-level rise by transferring water from the ocean to the polar ice sheets through increased ocean evaporation and precipitation. Because average temperatures in the polar regions would remain well below the freezing point, increased precipitation there would take the form of snow and thicken the ice sheets.