Human activity in the Amazon Rainforest

• Between the years 2000 and 2007 the amazon was deforested at a rate of 20,000 km per year
• Between what years was the amazon deforested at rate of 20,000 km per year?

  2000 and 2007
• Deforestation mostly takes place for cattle ranching 70 percent
• How much of the amazon was deforested between the years 2000 and 2007?

  20,000 km
• • In deforested areas, theres no tree canopy to intercept precipitation, so more precipitation reaches the ground surface.
  • There's too much water to soak into the soil.
  • Instead the water moves to the rivers as surface runoff, increasing risk of flooding.
• • Deforestation reduces the rate of evapotranspiration, meaning less water vapour reaches the atmosphere.
  • Fewer clouds form meaning precipitation decreases.
  • This increases the risk of drought
• What does deforestation reduce the amount of?

  evapotranspration
• When there is a increase in the rate of deforestation what decreases?

  precipitation
• Deforestation means that less of what reaches the atmosphere?

  water vapour
• By the year 2050 temperatures in the amazon will have increased by 2 to 3 degrees
• When forests are cleared and burned 30 to 60 percent of the carbon is lost to the atmosphere
• By what year will temperatures in the amazon will have increased by 2 to 3 degreees?

  2050
• By how many degrees will temperatures in the amazon rainforest rise by 2050?

  2 to 3 degrees
• When forests are cleared and burned 30 to 60 percent of the carbon is lost to the atmosphere
• When forests are cleared an burned how much of carbon is lost to the atmosphere?

  30 to 60 percent