By the end of the year, it will be too late for some.
Green building designers will have had time to design their buildings in the greenest possible way.
But for many, they will need to wait another few years to do so.
In that time, they’ll need to re-evaluate the design of their buildings, rethink how they can best be green, and adjust to the new landscape of urban sprawls.
Green buildings are defined as buildings that have low energy use and use less water and energy per square foot than non-green buildings, but also that meet specific green building performance requirements.
And they are often built to be environmentally friendly.
To be green a building must meet a number of environmental criteria.
For example, it must have a low energy consumption of less than 2 percent of the building’s total energy use, or an energy use per square meter of building space less than one percent of total building space, and have at least 20 percent of its energy use made from renewable sources, including wind, solar, and geothermal energy.
It also must be constructed in a way that uses less energy than nonresidential uses.
Building designers and other experts are working to make green buildings easier to construct and more affordable to build.
But there are still challenges ahead for those building them.
One of the biggest is finding the right building materials.
The green building design process is often based on the assumption that green building materials will be available in the market at a price that’s competitive with residential buildings.
But that is not always the case.
As the number of buildings in major metropolitan areas grows, builders will be required to consider the environmental, economic, and energy benefits of building new green buildings.
Building materials are not always easy to come by, and in some cases it may be difficult to find the right material for the right project.
“It’s a balancing act,” said Sarah J. Smith, director of the Center for Building Energy Management at the University of Florida.
“Building materials are one of the most underappreciated elements of green design, because we are talking about building systems that have an impact on climate change, and on water, air, and land use.”
Green building materials are expensive because they are made of very small pieces of materials, but they are relatively easy to find.
And while there are numerous different types of building materials, the major components of these materials are: wood, concrete, and metal.
For a green building to be green in nature, it needs to be made of those materials.
Wood, which is a great energy source, is not available in abundance in the United States.
But it is plentiful in places like California, Arizona, and Florida, which have vast forests that provide large areas of green forest.
The materials used to make wood and concrete also tend to be cheap.
Wood costs less than $1 per square inch, while concrete costs more than $2 per square yard.
Building concrete, on the other hand, is typically made of heavy, hard, and brittle materials.
This means it is easier to break down, and harder to repair.
And because it is so expensive to make, the materials are usually recycled.
“A lot of materials can be made in the cheapest way, but the costs are very high,” said David A. Cogswell, senior lecturer in urban design at the School of Architecture at the Massachusetts Institute of Technology.
“The materials used for building concrete tend to get used more and more in commercial buildings than they should.”
Building materials in general, such as glass and steel, are not cheap.
They are made mostly of aluminum and are very hard.
Because of their cost, most green building designs are based on building materials that are more expensive.
But concrete is a different story.
According to Jens Rees, associate professor of urban design and urban planning at the Department of Architecture and Planning at the Universität Braunschweig in Germany, concrete can be as cheap as $5 per square square foot.
Building that is made of concrete is therefore less expensive than wood and metal, and it is a lot more sustainable.
“One of the things that I really like about concrete is that it can be recycled,” said Rees.
“If we could find a way to make concrete that could be reused and reused, we could make concrete without using any of the materials we use in the building.”
Building a building that is designed to be energy efficient and to have a good environmental impact is not something that comes naturally to most people.
But as the cost of energy in the world continues to rise, building a green design process for green building is becoming more important.
Building a green living space, for example, requires more energy than a green apartment building, but is a much less expensive alternative to a building with a green facade.
Green living spaces are often based in large green spaces like parks or forests, and can also include gardens and other natural features.
But the process