Answer:
The environmental policy that must consider the expensive startup costs associated with building machines that harvest energy from clean sources is reducing air pollution.
Step-by-step explanation:
Reducing air pollution often involves transitioning from fossil fuels to clean energy sources, such as wind, solar, or hydropower. However, building the infrastructure needed to generate energy from these sources can be expensive and require significant upfront costs. Therefore, policies aimed at reducing air pollution must consider the economic and financial aspects of transitioning to clean energy sources.
Regulating deforestation, introducing new farming methods, and protecting ocean reefs may also have economic costs, but the startup costs associated with these policies may not be as significant as those associated with building clean energy infrastructure.