Think about this:

  • It took millions of years for humans to reach a population of 1 billion
  • That milestone happened about 200 years ago
  • 100 years ago, there were 1.6 billion people around
  • Today there are 6.7 billion people walking the Earth
  • In 50 years, there could be 9 billion

More to think about:

  • 200 years ago, forests covered about 40 percent of the planet's land mass
  • Today we are closing in on 20 percent coverage, losing close to 1 percent per year

 And some more:

  • Species loss today is about 1,000 times greater than the Earth's background level
  • In 1950, no fish stocks had collapsed
  • Today, 30 percent of fish stocks are unharvestable
  • Before 2050, all fish stocks may be collapsed

 And even more:

  • In the past 100 years, sea levels have risen 4.33 inches -- for which natural process cannot account
  • By 2100, that change could amount to more than 20 inches
  • The world's temperature has risen 1.1 deg C (2 deg F) since 1900
  • Average temperatures may climb by to 1.9 deg C (3.5 deg F)