IETA | 28,312 followers on LinkedIn. The leading voice of the global business community on emissions trading since 1999. Also follow our @ieta-events page | MAKING NET ZERO POSSIBLE. IETA is an association of more than 300 members who have an active stake in the international carbon markets to deliver net zero emissions. Its members include some of the largest international banks, energy and industrial companies, in addition to NGOs active in environment and conservation.