The U.S. Environmental Protection Agency estimated that Keystone XL tar sands oil would result in
additional greenhouse gas emissions of 27 million metric tons annually compared with conventional oil.
In fact, in its own legal brief, Ecology was transparent about its authority to do more if it wanted: «Ecology does not argue that it lacks the authority to
adopt additional greenhouse gas emission standard [s] if it chooses to do so.
Even so, other experts say a full life - cycle assessment would be required to ensure that solving the plastic problem in this way wouldn't lead to other problems,
like additional greenhouse gas emissions.
Partly that reflects the fact that costs begin rapidly to escalate beyond that amount of warming; partly it reflects the possibility (discussed in considerable detail by Mr. Lynas) that that may be enough warming to trigger climate feedbacks that would make yet more warming inevitable even
without additional greenhouse gas emissions.
This misalignment creates cost inefficiencies and
additional greenhouse gas emissions.
However, as co-advisor Mark Fulton says, «KXL will improve revenues in the short - term which means that it will help catalyse new investment, more oil - sands production and
additional greenhouse gas emissions».
BH: Some of them are talking about climate sensitivity at 1.2 C, at 1.5 C. I think this is completely implausible because the basic energetics of the climate system responding to
the additional greenhouse gas emissions almost from simple physics, has to be at least 1.2 C and possibly more before you begin to take into account any of the feedbacks in the system from water vapour in clouds and so on.
In terms of
additional greenhouse gas emissions, producing fuel from oil shale produces eight times the emissions of making fuel from conventional sources of petroleum.
«KXL will improve returns in the short - term, which means that it will help catalyze new investment, more oil - sands production, and
additional greenhouse gas emissions,» adds co-advisor Mark Fulton.
The recent wave of news and magazine articles about scientists struggling to explain the warming slowdown could prolong or deepen the public's skepticism.But the «consensus» never extended to the intricacies of the climate system, just the core belief that
additional greenhouse gas emissions would warm the planet.