The growing global demand for soybeans due to its different uses and by-products, as well as its use in the diet of several livestock species, is forcing the industry to seek alternative protein sources. Environmental concerns related to huge volumes of poultry manure serve as a warning for the choice of more sustainable production systems. Thus, the current review investigates the processing of an insect meal as an alternative protein source to feed broilers. The five desirable features in the selection of insect species proposed by the Food and Agriculture Organization (FAO) show that the high productivity of biomass, feed conversion efficiency and the organic waste conversion capacity from poultry farms is aided by the use of larvae from housefly and black soldier fly species. Brazilian production of such insects is possible due to climatic and environmental conditions and has the potential to supply part of the protein demands of the Brazilian poultry industry when raised in controlled environments. The prevalence of tropical climatic conditions and the possible use of organic waste from poultry farms as substrate can mitigate some environmental issues as well as generate income to smallholder farms prevailing in this activity.

As long as all interest rates move in tandem – including the rate of return on paper currency – economic theory suggests no important difference between interest rate changes in the positive region and interest rate changes in the negative region. Indeed, in standard models, only the real interest rate and spreads between real interest rates matter. Thus, in most respects, negative interest rate policy is conventional. It is only (a) what needs to be done with paper currency, (b) difficulties in understanding negative rates or (c) institutional features interacting with negative rates that make negative interest rate policy unconventional.