It depends, if it is cost efficient to do so. For example, at the moment, the world is mostly reliant on petrol as a fuel source. It is generally agreed, that petrol extraction and refining costs major damage to the environment in the form of oil spills, soil erosion and general environmental harm. However if you were to fix this, there would be no way to do it. The technology does not exist to cleanly extract and refine oil. The money to clean up oil spills would be too much for companies to stomached. In the meantime, there is a huge market for renewable energy and alternative fuels which a lot of companies are attempting to take advantage of. For example, the Prius is such a fine statement of capitalism's ever fluid force to go where the money is. It goes both ways. This is one of the main reason why the environmental summit at Copenhagen didn't work out. A lot of emerging nations like China and Brazil disagree with developed nations like the U.S. on carbon targets.

Are all these questions for your homework?

Quite on the contrary,protecting the environment will certainly enhance the economical growth. The environment houses all natural resources, flora and fauna and all are required resources for the welfare and progress of the economy.

Protection of the environment is very essential for the growth of the economy, Because through the protection of the environment will protect the resources of the economy and environment, that is containing all of these resources.