Global Climate Change

By Matt Gallison

Causes

  • Warming that results when the atmosphere traps heat radiating from Earth toward space

  • Burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide

Evidence

  • Changes are attributed to very small variations in Earth’s orbit that change the amount of solar energy our planet receives

  • Ice cores drawn from Greenland, Antarctica, and tropical mountain glaciers show that the Earth’s climate responds to changes in greenhouse gas levels

  • United Nations concluded that there's a more than 90% probability that human activities over the past 50 years have warmed our planet

Consensus

  • Rapid warming in earth's temperature

  • Rising subsurface ocean temperatures

  • Increases in average global sea levels from retreating glaciers

  • Changes to many physical and biological systems

Actions To Fix Global Climate Change

  • If we stopped emitting greenhouse gases today, global warming would continue to happen for at least several more decades

  • Minimize greenhouse gas emissions using current technologies

  • Enhancing fuel economy for on- and off-road vehicles

  • Adopting non-combustion energy sources based on solar thermal, solar photovoltaic, wind, tidal power, or nuclear energy can reduce carbon dioxide