The article deals with the issues of the legal mode of responsible investment as an important means of implementing measures to control environmental pollution, particularly in the agro-industrial and closely related complexes. The article analyzes the development of green finance system in Russia; it describes the main current regulations in the field of responsible investment. It is proved that proper legal support for investment, taking into account ESG factors, could solve the problems described in the article and ensure the introduction of economical, ergonomic and environmentally friendly technologies in the long term. Proposals were formulated to provide investors, including unqualified ones, with the opportunity to invest in green bonds, as well as to establish a mandatory minimum share of green bonds in the portfolio of institutional investors.