Global Warming is doomsday hype to create pork projects, a carbon tax, more government intervention, monopolies, and to control any business threat to the status-quo.
Global Warming cultist only want to show you portions of the graph for their scare tactics. Heretics however will openly show you as much data as you want because the empirical data is on their side. The earth has been cycling in hotter and cooler times for thousands of years.