As an AI language model, I don’t have the up-to-date information about all countries and their sustainable initiatives. However, some notable countries that have implemented successful initiatives to promote sustainable and energy-efficient infrastructure for senior living communities are:

1. Germany – has implemented various energy-efficient and sustainable housing models for senior citizens, including passive houses and integrated energy concepts.

2. Netherlands – has introduced sustainable housing projects for seniors, such as senior co-housing, which encourages communal living and promotes energy savings.

3. Denmark – has developed senior-friendly, energy-efficient housing designs that are both affordable and sustainable.

4. Sweden – has implemented sustainable housing for seniors, such as the Hammarby Sjöstad project, which promotes sustainable living and green infrastructure.

5. Canada – has introduced the R-2000 standard for energy-efficient housing and has numerous sustainable senior-friendly housing projects.

6. Norway – has numerous innovative sustainable housing designs for seniors, such as the Kollafjord Senior Center, which promotes communal living and energy savings.

7. Australia – has sustainable housing schemes and initiatives that are focused on energy efficiency and provision of renewable energy.

8. Japan – has developed sustainable housing and energy-efficient technology for seniors, such as the Tomeyama Cohousing Community, which promotes communal living and renewable energy.

9. USA – developed various sustainable senior living communities and energy efficient infrastructure, such as Green House Project.

10. United Kingdom – has sustainable housing initiatives, including retrofitting older housing units for energy efficiency and promoting accessible housing.