; (ii) build green spaces located within half of a mile of a public housing that is not within half of a mile of any green space; (iii) work collaboratively with local governments, colleges, universities, and other institutions to study urban heat island effects and benefits of cooling green spaces; (iv) use environmentally beneficial components, such as sustainable landscape features, upcycled and recycled materials, and materials with low carbon footprint; (v) contain safe trails or routes, such as trails, bikeways, and sidewalks, that connect to neighborhoods and enhance access to green spaces. (f) Use of amounts An eligible entity that receives a grant under subsection (a) shall use amounts provided to cover costs associated with— (1) rebuilding, remodeling, expanding, integrating, or developing existing or building new green spaces, including improvements in park landscapes, infrastructure, buildings, and support facilities; (2) planting vegetation in project areas, including maintaining and monitoring planted vegetation for a period of up to 5 years to ensure successful establishment; (3) preparing the project site and conducting construction, including the costs of labor and costs associated with use of machinery; (4) training activities associated with the construction