Here is a summary of the main proposals for how to cut emissions of greenhouse gases, some more comprehensive than others:

• Systems for cutting emissions of greenhouse gases
  
• Aviation and shipping cap-and-trade.
  
• Cap and dividend.
• Cap and share. See the cap-and-share video.
  
• Carbon share.
  
• Contraction & convergence.
• Fee-and-dividend (James Hansen) is described in Copenhagen has given us the chance to face climate change with honesty (The Observer, 2009-12-27), in Sack Goldman Sachs Cap-and-Trade (PDF, 14 KB), and in Storms of my grandchildren, London: Bloomsbury, 2009.
• Global carbon trading: a framework for reducing emissions (PDF, 3.6 MB, Mark Lazarowicz MP, July 2009). This and related reports may also be downloaded from the DECC website.
• K2S comments on this report (PDF, 46 KB).
• Greenhouse development rights.
• Kyoto1: the Kyoto protocol and associated schemes such as the EU ETS, the CDM, voluntary carbon offsets, EU targets for cuts in emissions by member countries, and more.
• Kyoto2.
• Mexico proposal (PDF, 132 KB, 2008-08-13).
• Occupy Rio Plus 20. Item 5: ... Global Carbon Fee on extraction of fuels ....
• Personal carbon allowances.
• Safe carbon. See We shouldn't fret about the carbon footprint of Will.i.am's helicopter (The Guardian, Myles Allen, 2012-05-25); Is making carbon 'SAFE' the answer? and The case for mandatory sequestration (PDF), Myles R. Allen, David J. Frame & Charles F. Mason, Nature Geoscience 2, 813 - 814 (2009), doi:10.1038/ngeo709.
• Solving the climate dilemma: the budget approach (PDF, 2.3 MB, German Advisory Council on Climate Change (WBGU), November 2008).
• Associated proposals
  
• Bali Action Plan -- a general framework to guide future negotiations.
  

The main features of schemes to cut emissions of greenhouse gases are summarised in this table:

Short name	Full name	Budget	U or D	Funds	GHG scope
ASCT	Aviation and shipping cap-and-trade	Yes	D	Yes	CO2
CD	Cap and dividend	Yes	U	No	CO2
CS	Cap and share	Yes	U	No	CO2
CbS	Carbon Share	Yes	U	No	CO2
C&C	Contraction & convergence	Yes	D	Yes	All
FD	Fee and dividend	No	U	Yes	CO2
GCT	Global carbon trading	Yes	D	No	All
GDR	Greenhouse development rights	No	D	Yes	CO2
K1	Kyoto1 and associated schemes	No	D	Yes	All
K2	Kyoto2	Yes*	U	Yes	All
Safe	Safe carbon	Yes	U	Yes	CO2
M	Mexico proposal	No	?	Yes	CO2
Occupy	Occupy Rio Plus 20	No	U	No	CO2
PCA	Personal carbon allowances	Yes	D	No	CO2
WBGU	The budget approach (WBGU)	Yes*	D	Yes	All

Key:

• Budget: a global budget for emissions of industrial greenhouse gases. 'Yes*' means that the importance of a global budget is given particular emphasis.
  
• U or D: "Upstream" or "downstream" controls?
• Funds: Proposes mechanisms to raise funds for mitigation and adaptation?
• GHG scope: The range of greenhouse gases that are controlled.