Escribe how legislation and control are used to reduce the environmental impact of the construction and environmental sector

Describe how the following legislation and control measures are used to reduce the environmental impact of the construction and built environment sector.
1 Legislation:
Planning
Environment Protection

2 European Directive:
Energy
SEA


Briefly describe what those legislation are,what they do(recommend),development and enforcement.
I need about 500 words for each legislation.
Would be glad to have
For Planning legislation:
advice/advice_legislation/advice_key_legislation/legislation_order.htm

Planning Policy statement:
planningpolicystatements/