Change:  believes nuclear power should comprise a significant portion of US energy production. "We all know in the end, that addressing global warming is about innovation   View changes from previous version. (Word count: 791)

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Change: So what are the positions of Democrat candidate Barack Obama and Republican candidate John McCain on climate change? Here we comb various sources such as the candidates' manifestoes, their answers reported in Nature Reports: Climate Change this week, and a debate between two of the candidates' senior advisers. Issue:   View changes from previous version. (Word count: 1297)

Change: John McCain's Principles for Climate Policy • Climate Policy Should Be Built On Scientifically-Sound, Mandatory Emission Reduction Targets And Timetables. • Climate Policy Should Utilize A Market-Based Cap And Trade System. • Climate Policy Must Include Mechanisms To Minimize Costs And Work Effectively With Other Markets. • Climate   View changes from previous version. (Word count: 1358)

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Change: Analysis – causes, assumptionsEvaluation -- values, criteriaJohn McCain's Principles for Climate Policy • Climate Policy Should Be Built On Scientifically-Sound, Mandatory Emission Reduction Targets And Timetables. • Climate Policy Should Utilize A Market-Based Cap And Trade System. • Climate Policy Must Include Mechanisms   View changes from previous version. (Word count: 1375)

Change: or "economy." Select Obama or Biden. John McCainhttp://www.johnmccain.com/Informing/Issues/da151a1c-733a-4dc1-9cd3-f9ca5caba1de.htmStatement of the issue: Analysis – causes, assumptionsEvaluation -- values, criteriaJohn McCain's Principles for Climate Policy • Climate Policy Should Be Built On Scientifically-Sound, Mandatory Emission Reduction Targets And Timetables. • Climate Policy Should Utilize   View changes from previous version. (Word count: 1371)

Change: {This section could use some cleanup. First, you still have Dr. PB's lists up without filling in the appropriate information like "Evaluation -- values, criteria."   View changes from previous version. (Word count: 1357)

Change: There were only format changes (bold, italics, etc.) in this version. See this version for details. (Word count: 1323)

Change: John McCain Proposes A Cap-And-Trade System That Would Set Limits On Greenhouse Gas Emissions While Encouraging The Development Of Low-Cost Compliance Options. A climate cap-and-trade   View changes from previous version. (Word count: 355)