This question comes from the sample APMP exam causes a bit of panic in most candidates. The question is not exactly clear what is is looking for. Is environmental legislation to do with all legislation or just that relating to the environment. The safest bet is to interpret the question as that relating to environmental policy. So using the study guide the answer would be.
1) Many projects are required to complete and environmental impact assessment. This is important for large infrastructure projects which may have a significant detrimental effect on the ecology in an area. For example a new road or railway will often have to evaluate the environmental impact of the project and identify measures to minimise the effects.
2) Many project may be building on contaminated land and significant legislation exists on the treatment of this contaminated land. Projects must consider how this contamination can be reduced to safe levels by either removing it from the site or encapsulating the contamination beyond harm.
3) Many project have to comply with energy conservation legislation. In particular this may impose constraints on the types of material and construction methods that can be used for a particular project. To be effective a project manager should consult on the energy regulations early in the project lifecycle.
4) Many projects are constrained in terms of site access. They can only work for limited times during the day for example between 8:00am and 17:00 Monday to Friday. This can be significant for deliveries and noise generated on the site. Again project managers need to understand the constraints to plan the project effectively.
5) Environmental legislation protect many flora and fauna. For example work is not possible in the bird nesting season or greater crested newts must be protected. Again these constraints can have a major impact on the way the project is delivered, so a project manager will need to consult the relivant experts to understadn the procedures that need to be folowed to comply with this legislation