The term SDGs represents the seventeen United Nations’ Sustainable Development Goals, which were globally adopted by world leaders on September 15, 2015. The global goals which came into full of force on the 1^st of January, 2016 has since then been implemented across the world. Various goals have been highlighted to be met by 2030. Amongst them are SDG1 (no poverty), SDG2 (no hunger), SDG3 (good health and well-being), SDG4 (quality education), SDG5 (gender equality), SDG6 (clean water and sanitation), SDG7 (automobiles and clean energy), and ten others.

Blockchain, on the other hand, is an advanced database mechanism that allows transparent information sharing within a business network. A blockchain database stores data in blocks that are linked together in a chain.

The blockchain plays a pivotal role in SDG implementation as it showcases the technology to carry out advocacy. Several use cases have been seen over the years. It is important to look at some real-life use cases.

SolarCoin: SolarCoin is a cryptocurrency that incentivizes a solar-powered planet. It was introduced in 2014 by a group of volunteers working together as the SolarCoin Foundation. It was designed to accelerate the adoption of solar energy, leading to a cleaner energy economy. This is in line with goal 7: affordable and clean energy.

One solar coin is generated when one megawatt hour of energy is generated by solar panels. These SolarCoins can in turn be traded on crypto markets for other liquid digital currencies like bitcoin (including its rival ether) or US dollars. The current price is $0.00553 USD, with a current market price of 282,684.34 USD.

CleanWaterCoin:This is a unique initiative. It is the first ever coin designed and developed to be a nonprofit organization. The Clean Water Coin Initiative have teamed up with The Water Project, which is a crypto-friendly water charity, to create a cryptocurrency Charity and coin that lets a community actively participate in helping provide clean water Water is a cryptocurrency that enables users to generate through the process of mining. A total of $88 has been raised so far. All for the purpose of reaching the set goal 6, which is clean water and sanitation.

Curecoin: This coin solves the problem of the third goal, which is good health and well-being. CURE has a circulating supply of 28.23 M CURE. Curecoin describes itself as a cryptographic utility token dedicated to replacing ASIC mining with protein folding computations, helping scientists find new medicines in lieu of mining hashes. The live Curecoin price is $0.01097 USD. It is one of the blockchain systems that provides scientists with a direct way to stimulate research via funding through digital assets and validation and review by peers.

HumanIQ coin: It was launched in 2016. Humaniq is designed for those who don’t possess identification, with the mobile app utilizing a new reputation concept based on facial recognition for identity management. It is based on the Ethereum blockchain and is attempting to tackle the global problem of financial exclusion for those who don’t have banks. It is a good initiative to tackle goal 9—industry, innovation, and infrastructure.

In conclusion, these real-life use cases demonstrate the transformative potential of blockchain technology in addressing key Sustainable Development Goals (SDGs). SolarCoin, with its focus on incentivizing solar energy adoption, aligns seamlessly with the goal of achieving affordable and clean energy (Goal 7). CleanWaterCoin pioneers a novel approach as a nonprofit organization, collaborating with The Water Project to actively involve communities in providing clean water, contributing significantly to Goal 6 - Clean Water and Sanitation. Curecoin creatively addresses the third goal of Good Health and Well-being by dedicating itself to replacing ASIC mining with protein folding computations, supporting scientific research for new medicines.

As these initiatives showcase, blockchain not only serves as a technological enabler but also as a catalyst for positive social change. These innovative applications highlight the versatility of blockchain in creating tangible solutions for some of the world's most pressing challenges outlined in the SDGs. As the blockchain continues to evolve, its role in advancing sustainable development remains a promising frontier with the potential to foster positive change on a global scale.