Bat prevent them from spending too much time in unfamiliar places, and decrease predation. In some species, pregnant individuals may not use torpor. The smallest bat is Kitti's hog-nosed bat ("Craseonycteris thonglongyai"), which is long with a wingspan and weighs . It is also arguably the smallest extant species of mammal, next to the Etruscan shrew. The largest bats are a few species of "Pteropus" megabats and the giant golden-crowned flying fox, ("Acerodon jubatus"), which can weigh with a wingspan of . Larger bats tend to use lower frequencies and smaller bats higher for echolocation; high-frequency echolocation is better at detecting
China Green Food Development Center the process, and do not generally monitor actual use of agricultural chemicals, preferring instead to test the products themselves for chemical residues. Green Food thus provides farmers with a steeped path way from chemical farming, to Green Food Grade A through to organic certification.Also,the China Green Food Development Center demonstrates the genesis of Green Food :"China's Green Food development is the outcome of actively exploring new ways of food production and consumption based on China's own situation and in line with the international trend of sustainable development. The statistics show an increase of 7 percent of green food enterprises which