As an AI language model, I don’t have personal opinions. However, here are some top real estate platforms or apps for exploring investment opportunities in green building projects:

1. Green Building Advisor – A website dedicated to green building practices, featuring blogs, forums, articles, and a directory of green building professionals.

2. US Green Building Council – It is a non-profit organization that advocates for sustainable building practices and promotes the Leadership in Energy and Environmental Design program.

3. GRESB – It provides information on the environmental, social, and governance (ESG) performance of real estate companies and funds.

4. Building Energy Exchange – It is a non-profit organization that provides education and resources on sustainable building practices, particularly in New York City.

5. Energy Star – It is a program that provides a rating system for energy-efficient buildings and appliances.

6. Green Building Elements – It is a website that features articles and information on eco-friendly building materials and design.

7. Smart Energy Analytics Campaign – It is a program that helps building owners and managers use data to make their buildings more efficient.

8. Ecobuilding Pulse – It is an online platform that provides news and information on green building projects and design.

9. Better Buildings Challenge – It is a program that encourages building owners to commit to reducing their energy use by 20% over a 10-year period.

10. GreenBiz – It provides information on sustainable business practices, including green building and real estate.