Environmental activists have utilised diverse tactics in the attempt to assert their influence upon the decision-making process and society. This chapter begins with an examination of the use online tactics for environmental activism and the reticence to engage in such use. It considers the use of computer-mediated communication (CMC) as a substitute for the mainstream media on which people have relied, and hence for the production of digital alternative media (DAM). Concurrent to the use of any tactics, environmentalists usually consider the ways in which they will publicise their actions prior to and after the event. CMC has been used to extend existing tactics into the realm of cyberspace and in developing new forms of action. The chapter concludes by exploring whether these changes in online tactics and alternative media production enable environmental activists to be more effective in achieving their aims and targeting their adversaries.