they all confirm the original hockey stick conclusion: the 20th century is the warmest in the last 1000 years and that warming was most dramatic after 1920.
they all confirm the original hockey stick conclusion: the 20th century is the warmest in the last 1000 years and that warming was most dramatic after 1920.
effects of global warming:17
a wide variety of temperature proxies together prove that the 20th century was the hottest recorded in the last 2,000 years.