Final answer:
Harvey suggests that political ideologies deeply influence ideas about environment, population, and resources, indicating that these subjects are intrinsically political both in their origins and their effects on policy and society.
Step-by-step explanation:
When Harvey says that ideas about environment, population, and resources are political in origin and have political effects, he means that these issues are deeply influenced by political ideologies which shape perceptions and policy-making. Political decisions impact very personal aspects of our lives, including environmental conditions and resource management. Political ideologies and decisions influence how we approach and prioritize environmental and population concerns, showing that these ideas are not outside the realm of politics but deeply embedded within it.
Issues such as political science, environmental determinism, and political economy highlight the intersection between politics and social or natural phenomena, indicating that political motivations and effects permeate all aspects of these fields. These intersections demonstrate that the study and management of the environment, resource distribution, and population dynamics cannot be viewed as apolitical or purely scientific matters. Instead, they are entwined with political action and philosophical debates about how societies should be organized and governed.