<Li> G - 20 London Summit (April 2009) </Li> <Tr> <Td> Legislation and spending (show) <Ul> <Li> 2008 European Union stimulus plan </Li> <Li> 2008--09 Keynesian resurgence </Li> <Li> American Recovery and Reinvestment Act of 2009 </Li> <Li> Banking (Special Provisions) Act 2008 </Li> <Li> Chinese economic stimulus program </Li> <Li> Economic Stimulus Act of 2008 </Li> <Li> Emergency Economic Stabilization Act of 2008 </Li> <Li> Federal Reserve responses to the subprime crisis </Li> <Li> Government intervention during the subprime mortgage crisis </Li> <Li> Green New Deal </Li> <Li> Housing and Economic Recovery Act of 2008 </Li> <Li> National fiscal policy response to the Great Recession </Li> <Li> Regulatory responses to the subprime crisis </Li> <Li> Subprime mortgage crisis solutions debate </Li> <Li> Term Asset - Backed Securities Loan Facility </Li> <Li> Troubled Asset Relief Program (TARP) </Li> </Ul> </Td> </Tr> <Ul> <Li> 2008 European Union stimulus plan </Li> <Li> 2008--09 Keynesian resurgence </Li> <Li> American Recovery and Reinvestment Act of 2009 </Li> <Li> Banking (Special Provisions) Act 2008 </Li> <Li> Chinese economic stimulus program </Li> <Li> Economic Stimulus Act of 2008 </Li> <Li> Emergency Economic Stabilization Act of 2008 </Li> <Li> Federal Reserve responses to the subprime crisis </Li> <Li> Government intervention during the subprime mortgage crisis </Li> <Li> Green New Deal </Li> <Li> Housing and Economic Recovery Act of 2008 </Li> <Li> National fiscal policy response to the Great Recession </Li> <Li> Regulatory responses to the subprime crisis </Li> <Li> Subprime mortgage crisis solutions debate </Li> <Li> Term Asset - Backed Securities Loan Facility </Li> <Li> Troubled Asset Relief Program (TARP) </Li> </Ul> <Li> 2008 European Union stimulus plan </Li>

What was the main cause of the 2008 global economic crisis