Black Carbon Black Carbon Black Kigali Environment Impact on Well-being CONTRIBUTE Impact on Well-being CONTRIBUTE Impact on Well-being CONTRIBUTE Nationally Determined Contribution of Costa Rica 2020 Fair Transition Fair Transition3.5. By 2022, Costa Rica will have developed a strategy for the development and promotion of green hydrogen in the country. 3.6. During the period of implementation of this contribution, Costa Rica will push for the moratorium on the exploration and exploitation of hydrocarbons in the national territory to be brought into force. Black Carbon Black Impact on Well-being CONTRIBUTE Impact on Well-being CONTRIBUTE Nationally Determined Contribution of Costa Rica 2020 3.4. By 2030, measures for technological replacement and energy efficiency in the passenger, cargo and industrial transport sectors will reduce black carbon emissions by 20% compared to emissions