It has been observed that in the last years, outbreaks caused by fresh produce are increasing around the world, suggesting that, in that particular step of the chain, primary production, more efforts are needed in order to get more safety.
Everyone involved in the primary production, manufacture, sale, or prescription of medicinal cannabis products needs some kind of licence, permit, or authorisation.
Concerning settlements, this means providing living space mainly for the population needed to keep up primary production, basic supply and recreational uses.
In other words, we need to estimate the proportion of primary production can be sustainably removed each year without compromising ecosystem integrity.
However, the effect of granulometry and chl a concentration profile in light attenuation on irradiance and on fluorescence signal in the photic layer need to be taken into account when primary production is estimated using PAM.
The greatest future need is to understand how long-term changes in primary production are linked to soil processes.
There is a pressing need for renewable and optimal use of resources towards sustainable primary production and processing systems worldwide.
All the discussed approaches relate socio-economic energy and material flows to the bioproductive area needed to support them, above all, the ecological footprint and the human appropriation of net primary production.
Energy accounts for 30% of primary aluminium production costs, but recycling of aluminium scrap uses only 5% of the energy of primary production (pdf).
And primary production seems to be going on as planned in Austria.
