Gustavo Rusconi, in Habitat's Green Ideas, outlines crucial steps for New York City co-op and condo boards to comply with Local Law 97, aiming to reduce building carbon emissions by 2024. Failure to meet targets leads to fines. The steps include hiring an energy engineering firm, establishing a long-term budget, enhancing the building envelope, optimizing heating distribution, and engaging residents through apps like GridRewards. Following these measures ensures compliance, cost savings, and avoidance of fines under the law.