It is clear enough that Tonstad is a global thinker, and one of the things he has thought a lot about is creation care in light of sabbath observance. The problem is that despite the ecological potency of Sabbath observance, the earth is not merely crying out ‘give it a rest’ it is crying out, ‘we need an extreme makeover, a rejuvenation, a new creation, and Sabbath is not about that. It is not about resurrection, it’s about ceasing from creative activity. Romans 8.22is important in this discussion. The creation awaits the revealing of the sons of God, which is to say it awaits our resurrection and its own. It does not await a Sabbath rest, it awaits a resurrection, which is not the same thing. Tonstad says not a word about resurrection in Rom. 8 pp. 396-98.
“Neglect of creation and a relentless anti-sabbatarian bias are constants in the Christian enterprise” (p. 395). In fact Christians are often the worst offenders against creation, the worst exploiters. It is not a Biblical idea to say that nature serves no purpose but to serve the needs and whims of humans.
On p. 406 he takes Is. 66. 22-23 to mean that in the new creation we will be observing new moons and Sabbaths. But what the text means is in the new creation we will worship right around the liturgical calendar. Notice how the quote of this text in Rev. 15.3 leaves out the reference to Sabbath and new moons quite deliberately. That’s because the author knows of another day of worship— see Rev. 1— ‘the Lord’s day’ He argues that the whole deal is in play in Revelation because the context of Isaiah 66 is alluded to as well. (Nope).
To judge from pp. 412ff. he seems to think resurrection involves creation ex nihilo, even though Paul says it involved transformation of the living, and one would also assume raising of the dead bits of those who still have remains. He places much stress on the ‘instanteous’ nature of the change, at odds with the long process thinking of science about change. It is well to mention that one can overdo the analogy between old creation and new creation in various ways. Tonstad appears to be a materialist as well by which I mean he seems to think death means extinction despite texts like 2 Cor. 5—absent from the body and present with the Lord.