In the case of Brazil (frontier dynamic): People are hired to burn/cut the forest, subsequent legalisation opens land grab to agroindustrial elites, land gets developed for large scale cash crop production (soy, coffee etc) with significant help by European and US biotech, due to used up/eroded hummus strata land degrades and beef production takes over land use (with soy feedstock), repeat. Brazil exports soy (for feedstock mainly) and beef (both mainly to China). The whole system is very fragile, because the logistical infrastructure is insufficient and undeveloped and because the large scale monoculture requires genetic biostabilisation of the seeds, which makes the seeds dependent on foreign biotechnology and susceptible to disease.