1. Ethical issues: such as responsibility, honesty and confidentiality in engineering activities, and how to deal with the relationship with stakeholders.

2. Environmental issues: for example, the impact of engineering activities on the environment, the formulation and implementation of environmental protection measures, etc.

3. Safety issues: such as safety measures, accident prevention and emergency treatment in engineering activities.

4. Social issues: such as the impact of engineering activities on society and the protection of the rights and interests of social stakeholders.

5. Economic issues: such as economic benefits, cost control and return on investment of engineering activities.

The principles of environmental ethics in modern engineering activities mainly include:

1, the principle of respect:

Whether an action is correct or not depends on whether it embodies the fundamental moral attitude of respecting nature. People's respect for the natural environment depends on how we understand the natural environment and its relationship with people. The principle of respect embodies our first attitude towards the natural environment, so it becomes the first principle of our actions.

2. Integrity principle:

Whether an action is correct depends on whether it conforms to the position of coordinating environmental interests with human interests, not just on human wishes and needs. This principle aims to show that human beings and the environment are an interdependent whole. It requires human beings to fully consider the overall situation of the natural environment, especially the ecological interests, when determining the development and utilization of natural resources. Any behavior that only considers the interests of people in the process of engineering activities is wrong.

3, the principle of no damage:

If an action is at the expense of seriously damaging the health of the natural environment, then this action is wrong. The principle of harmlessness means the obligation not to harm everything in the natural environment that has its own advantages.

If nature has intrinsic value, it has its own goodness and interests, which requires people not to seriously damage the normal function of nature in engineering activities. "Serious damage" here refers to irreversible or irreparable damage to the natural environment. The principle of no damage fully considers the impact of normal engineering activities on natural ecology, but this impact should be remedied and repaired.

4. Compensation principle:

When an act causes damage to the natural environment, the responsible person must make necessary compensation to restore the healthy state of the natural environment. This principle requires people to fulfill an obligation: when the natural ecosystem is destroyed, the responsible person must restore the natural ecological balance.

All compensation obligations have a common feature: if his behavior breaks the normal balance between himself and the environment, he must be responsible for his wrong behavior and bear the compensation obligations brought about by it.