Green finance is becoming an important tool to foster sustainable development and to combat climate change․ This conceptual review paper intends to introduce the green finance as a framework and to analyze its main financial instruments: the green bond‚ the green loan‚ and the green equity․ This paper is based on systematic literature published in academic journals‚ universities and global and regional finance organizations in the period of 2016 to 2026‚ to present the literature's main ideas to identify its trends‚ and to evaluate the green financial tools' role in promoting the green investment․

In terms of preferences‚ green bonds remain the most common green finance instrument‚ as their structure is already well-known and established with investors․ Green loans are also gaining traction via flexible financing arrangements tied to environmental performance criteria․ Other fundraising methods like green equity and venture capital are less studied‚ but also potential sources for funding innovation and longer-term sustainability․ Other challenges include lack of standardization‚ lack of awareness and uneven market growth rates in countries like India․ Ultimately‚ it also lists recommendations for regulatory support‚ transparency and additional work at the instrument level․