Environmental problems whose dimensions include differential exposure to risk from toxic wastes and air pollution or lack of access to the natural beauty of parks based on ethnicity or race are issues of

environmental justice

Explanation:

The core concept of environmental justice ensured that health of people should not be suffered from the environment around them. Environmental Protection Agency of the United States of America defines it as meaningful participation of all persons, irrespective of race, color or national origin in the production, implementation, and enforcement of environmental laws, regulations, and policies.

answer; environmental science;