This report, the first in a series of three, focuses on the policy landscape needed to enable a transition to net zero emissions, identifying key policies at a sectoral and national level to support investments towards decarbonisation in Argentina, Brazil, and Peru. It also provides a brief description of the current general investment environment and analyses factors that influence international climate finance flows. Achieving the goal of limiting global temperature increase to 1.5°C above pre-industrial levels, as agreed under the Paris Agreement, requires a significant increase in low-carbon investments across all sectors of the economy.