Another point is that trees also should be given protection. During its lifetime, a tree should not be cut for industrial enterprises. In Kali-yuga, trees are indiscriminately and unnecessarily cut for industry, in particular for paper mills that manufacture a profuse quantity of paper for the publication of demoniac propaganda, nonsensical literature, huge quantities of newspapers and many other paper products. This is a sign of a demoniac civilization. The cutting of trees is prohibited unless necessary for the service of Lord Visnu. Yajnarthat karmanonyatra lokoyam karma-bandhanah: [Bg. 3.9]) work done as a sacrifice for Lord Visnu must be performed, otherwise work binds one to this material world. But if the paper mills stop producing paper, one may argue, how can our ISKCON literature be published? The answer is that the paper mills should manufacture paper only for the publication of ISKCON literature because ISKCON literature is published for the service of Lord Visnu. This literature clarifies our relationship with Lord Visnu, and therefore the publication of ISKCON literature is the performance of yajna. Yajnarthat karmano nyatra loko yam karma-bandhanah [Bg. 3.9]). Yajna must be performed, as indicated by the superior authorities. The cutting of trees simply to manufacture paper for the publication of unwanted literature is the greatest sinful act.