But there is a model that can be used.
Salt Lake City has built a model that can be scaled and replicated, says Phillips.
But technology moves fast, and a lighter, wider model that can be used with any eyewear will launch next year.
We're just looking to create a model that can be looked at, tweaked, changed and then used".
Fortunately, one of the group's stated goals is to "create and foster a model that can be replicated nationwide".
It is hoped this approach would provide a model that can be scaled to reach millions of farmers throughout sub-Saharan Africa and south Asia.
It's an incredible model that can be entirely private-sector driven (with pockets of angel investors) instead of waiting for the government.
"This is a model that can be used in almost any rural community that has access to organic waste, whether it's animal- or plant-based," Jenner says.
And it is a model that can be updated, as it will be after a new series of photographs are taken next month.
High-speed rail is a commercially viable project that is not dissimilar to building a toll road in terms of the financial model that can be deployed.
Andrew Tutt, unit director, says: "We have created a new experimental model that can be used to chart forms of tumour cell dormancy.
