TOEIC ETS

https://www.greenroofplus.com Basics. Photos. Resources. News What Are Green Roofs? Green roofs are an energy-saving option for office buildings and homes. A green roof is one that's covered with grasses, flowers, or other plants. It lowers heating and cooling costs while increasing a structure's aesthetic appeal. This Web site is designed for sharing ideas, photos, and resources to create and maintain a green roof. Planting a rooftop garden is a rewarding do-it-yourself project, but special waterproofing and other preparations require the services of an experienced contractor. Costs vary widely by region, roof size, and complexity of the garden you want to create. Be sure to get estimates from at least two contractors. If your contractor determines that your roof can handle the extra weight of soil, plants, and irrigation, ask about the project's timeline. Small, simple rooftop gardens may take only one week to complete.

According to the Web page, what can visitors to the Web site do?